Alliums for November: Plant garlic, sow onions in a hoophouse, eat leeks

Tadorna winter leeks in October.
Photo Pam Dawling

Cold-Tolerance of Alliums

Alliums are more cold-tolerant than most people believe. Here are my observations of killing temperatures for outdoor crops. Note that crops often survive night-time lows in the hoophouse that would have killed them outdoors.

  • 12°F (−11°C): garlic tops if fairly large, most fall or summer varieties of leeks (Lincoln,King Richard), large tops of potato onions
  • 10°F (−12°C) some leeks (American Flag aka Musselburgh and Scottish Flag, Jaune du Poiteau)
  • 5°F (−15°C): garlic tops if still small, some leeks (Bulgarian Giant, Laura, Tadorna, Bandit), some bulb onions, potato onions and other multiplier onions
  • 0°F (−18°C): chives, garlic, a few leeks (Alaska, Durabel); some bulb onions, yellowpotato onions, some onion scallions (Evergreen Hardy White, White Lisbon), Walla Walla onions sown in late summer (with rowcover for winter)

Planting Garlic

Planting garlic.
Photo Brittany Lewis

You can see my garlic slideshow for more info. I was surprised to find I haven’t written much in my blog about planting garlic, so here goes! See the alliums chapter in Sustainable Market Farming for more on types, varieties, and garlic genetics. The information here comes form that chapter.

When to Plant Garlic

Plant when the soil temperature at 4″ (10 cm) deep is 50°F (10°C) at 9 am. If the fall is unusually warm, wait a week. Instructions from Texas A&M say less than 85°F (29°C) at 2″ (5 cm) deep. We plant in early November. In New Hampshire, mid-October is the time. The guideline for areas with cold winters is 2-3 weeks after the first frost but before the ground freezes solid for the winter. In Michigan, planting time is 6 weeks prior to the ground freezing, giving enough time for root growth only, to avoid freezing the leaves. In California, garlic can be planted in January or February.

Both hardneck and softneck garlic do best when planted in the fall, though softneck garlic may also be planted in the very early spring if you have to (with reduced yields). If you miss the window for fall planting, ensure that your seed garlic gets 40 days at or below 40°F (4.5°C) in storage before spring planting, or the lack of vernalization will mean the bulbs will not differentiate (divide into separate cloves).

Garlic shoots emerging from the mulch a few weeks after November planting. Photo Twin Oaks Community

Garlic roots will grow whenever the ground is not frozen, and the tops will grow whenever the temperature is above 40°F (4.5°C). In colder areas the goal is to get the garlic to grow roots before the big freeze-up arrives, but not to make top growth until after the worst of the weather. In warmer areas, the goal is to get enough top growth in fall to get off to a roaring start in the spring, but not so much top growth that the leaves cannot endure the winter. If garlic gets frozen back to the ground in the winter, it can regrow and be fine. If it dies back twice in the winter, the yield will be lower than it might have been if you had been luckier with the weather. When properly planted, it can withstand winter lows of –30°F (–35°C). If planted too early, too much tender top growth happens before winter. If planted too late, there will be inadequate root growth before the winter, and a lower survival rate as well as smaller bulbs.

How Much Garlic to Plant

A yield ratio of 1:6 or 7 seems typical, and makes complete sense when you consider you are planting one clove to get a bulb of 6–7 cloves. Divide the amount you intend to produce by six to figure out how much to plant. For large areas 750–1,000 lbs/ac (842–1,122 kg/ha) are needed for plantings in double rows, 3″–4″ in-row (7.5–10 cm), beds 39″ (1 m) apart. For single rows, 8 lbs (3.6 kg) of hardneck or 4 lbs (1.8 kg) of softneck plants about 100′ (30 m). In the US, one person eats 3–9 lbs (1.4–4.2 kg) per year.

Popping garlic cloves in preparation for planting
Photo  Southern Exposure Seed Exchange

Popping Garlic Cloves for Planting

The garlic for planting should be taken apart into separate cloves 0–7 days before planting. We are doing this on November 7, along with our crop review meeting when the crew meets to make notes on the past season. This task is a good group activity. Twist off the outer skins and pull the bulb apart, trying not to break the basal plate of the cloves (the part the roots grow from), as that makes them unusable for planting. With hardneck garlic, the remainder of the stem acts as a handy lever for separating the cloves. We sort as we go, putting good size cloves in big buckets, damaged cloves in kitchen buckets, tiny cloves in tiny buckets and outer skins and reject cloves in compost buckets. The tiny cloves get planted for garlic scallions. Don’t worry if some skin comes off the cloves — they will still grow successfully. Cloves for planting should be from large (but not giant) bulbs and be in good condition.

Click the link to read about hot water treatment for seed garlic at WeeBee Farms. 

Pre-plant Seed Garlic Treatments

Many of us do nothing special with the cloves before planting, but if you have pest and disease problems, use pre-plant soaking treatments, usually done the night before planting. Some growers find they get better yields from treated cloves even if no problem was obvious.

To eradicate stem and bulb (bloat) nematode (Ditylenchus dipsaci), soak the separated cloves for thirty minutes in 100°F (37.7°C) water containing 0.1% surfactant (soap). Or soak for twenty minutes in the same strength solution at 120°F (48.5°C), then cool in plain water for 10-20 minutes.

Allow to dry for 2 hours at 100°F (37.7°C) or plant immediately. Anytime your garlic grows poorly and you can’t tell why, send a sample with the soil it’s growing in to your Extension Service to be tested for nematodes. Mites can eat the skins of the cloves, survive the winter and multiply all spring long, seriously damaging or even killing your crop. To kill mites (which hide between the wrappers) before planting, separate the bulbs into cloves and soak them overnight (up to 16 hours) in water.

Possible additions to the water include one heaping tablespoon of baking soda and one tablespoon of liquid seaweed per gallon (around 8 ml baking soda and 4 ml liquid seaweed per liter). Just before planting, drain the cloves and cover them in rubbing alcohol for three to five minutes, long enough for the alcohol to penetrate the clove covers and kill any mites inside. Then plant immediately. The long soaking will loosen the clove skins so that the alcohol can penetrate. Mite-infested garlic soaked like this does much better than unsoaked infested garlic. The solution used to kill mites can also be used to kill various fungal infections. The cloves need only fifteen to thirty minutes soaking.

In trials comparing treated and untreated cloves, treated cloves were larger and healthier than untreated ones. Fusarium levels can be kept down by adding wood ashes when planting and then possibly dusting the beds with more ashes over the winter (use moderation — don’t add so much that you make the soil alkaline). Or you could soak the cloves in a 10% bleach solution, then roll them in wood ash (wear gloves for handling ashy cloves). The wood ash soaks up the dampness of the bleach and provides a source of potassium. This information came from the Garlic Seed Foundation. Join GSF to find out all the details!

Other November Allium Planting

Plant shallot bulbs before the end of November and medium-sized potato onions (1.5″ – 2″, 4-5 cm) at the end of November or early December in zone 7. Finish dividing and replanting perennial leeks and Egyptian walking onions this month

Young onion plant in March.
Photo Kathryn Simmons

Special Allium Topic for November: Sow Bulbing Onions in the Hoophouse

We developed a system of growing onion starts in our hoophouse over the winter and transplanting them bare-root outdoors in very early March. I wrote about choosing onion varieties for your latitude last month. There I explained that to grow big onions we need to have large transplants on March 1, so we can have big vegetative plants before bulbing is triggered by the daylength.

The method involves making two sowings of bulbing onions, each enough for the whole planting. This provides insurance in case one date turns out better than the other. Then we follow this up with a partial third sowing to make up numbers of any varieties that didn’t germinate well. We make our first sowing November 10, our second November 20, and a third on December 5 as a back-up in case of problems. Our formula is: divide the number of onion plants wanted by 20, to give minimum length of row to sow, in feet. And sow this amount twice, 10 days apart. The onions will be planted out at 4″ (10 cm) apart. We add 20% to provide some slack. For a final row of 100′ (30.5 m), we’d need 100′ × 3 per foot × 1.2 (adding 20%) plants. 360 plants. We sow 3 seeds per inch (approx. 1 cm apart), 36 per foot (30 cm). At this sowing rate, we need 120″, or 10′ (3 m).

See The Year-Round Hoophouse for more on growing onions this way. If we find ourselves with extra onion plants in March, we usually re-categorize them as scallions. But we have also transplanted them in early March in a single row along the south edge of hoophouse beds, for an early crop. We got good onions but they dwarfed the pepper plants behind them. Maybe planting them on the north side of the bed is better?

Trimming roots from a leek in December.
Photo Pam Dawling

Storing Leeks

I wrote about how to dig up leeks last month. In zone 7 we leave our leeks in the ground till we need them, being sure to harvest the less hardy Lincoln and King Richard first. We use a walk-in cooler for short term storage (up to a week) and keep the root ends in water. Leeks are best stored at 33°F (0.5°C) and 65% relative humidity. In colder zones, leeks can be harvested and stored in a root cellar or basement. This is helpful in areas where the ground freezes solid for weeks on end. You can store leeks with the roots packed in soil, shoulder to shoulder in a crate or box in a root cellar, where they will keep for six weeks. They can be stored in plastic bags for two to three months at the right temperature, or frozen. Another possibility is to leave them in the garden, mulched with a foot (30 cm) of straw or hay as well as rowcover, if temperatures are below 10°F (–12°C). Our winter temperatures fluctuate a lot, so covering in-ground crops with mulch doesn’t work well for us.

Young greens in the hoophouse, nematodes, upcoming events

Young senposai transplant in our hoophouse.
Photo Pam Dawling

After the set-backs with our winter hoophouse greens  transplants that I wrote about last week, we worked really hard and got the whole house planted up. Most of the transplants have recovered from their transplant shock (wilting each day), during the cloudy weather we had.

The new seedlings are coming up fast and calling on us to thin them. We ended up not needing so many of the Plan D plug flat plants, but we’ve kept them for now “in case” .

Young Tokyo bekana transplant in our hoophouse .
Photo Pam Dawling

Ultimately if we don’t need them, they’ll go in a salad mix. I wrote about making salad mix last year. The past two days I have been able to harvest a mix in the hoophouse. The ingredient we are shortest of is lettuce. My first mix was spinach, Bulls Blood beet leaves, a few leaves of Tokyo Bekana, Bright Lights chard, Scarlet Frills, Ruby Streaks and Golden Frills, and a handful of lettuce leaves. Red Tinged Winter is growing fastest, of all the varieties we planted this year.

Ruby Streaks transplant in our hoophouse. Compare with Scarlet Frills below.
Photo Pam Dawling

Golden Frills mustard transplant in our hoophouse. I harvested a leaf for salad mix yesterday.
Photo Pam Dawling

Scarlet frills mustard in our hoophouse. Notice that this crop is frillier than Ruby Streaks.
Photo Pam Dawling

The mix I made today had fewer ingredients. I left the frilly mustards, the lettuces and the Tokyo bekana alone to grow some more. I used Bulls Blood beets, spinach, tatsoi outer leaves and a few Bright Lights chard leaves and stems.

Cucumber roots with nematodes (see circles).
Photo Pam Dawling

I have a new Mother Earth News blogpost, about the nematodes in our hoophouse. And I’m preparing a new slide show for the Carolina Farm Stewardship Association conference. See my Events page for details

For those of you on other social media, here are their handles and links (use the hashtag #CFSAC2018).

This week we will be popping garlic for planting and having our Annual Garden Crop Review meeting. Next week I’ll tell you more about garlic planting as part of the Alliums for November post.

Popping garlic cloves in preparation for planting
Photo credit Southern Exposure Seed Exchange

Hoophouse fall bed prep Plans A-D and spider-webs

Spiderweb glistening with dew, October hoophouse. Happy Halloween!
Photo by Bell Oaks

One of my colleagues noticed this beautiful web, like a crystal chandelier with dew drops. A few days ago I noticed lots of baby wolf spiders scurrying about. Next day they had started “ballooning” when they carry themselves on the breeze to a new place, spinning out a length of spider silk.

We’ve pulled our peppers, the last of the summer crop to remain in our hoophouse. This dislodged lots of spiders, both the zipper spiders and wolf spiders. We like to keep as many zipper spider egg-cases as possible in the hoophouse over the winter, so we have plenty of pest control next year. We move them off the plants onto the framework of the hoophouse or the hipboard “windowsill”.

Zipper spider egg cases hanging from the hoophouse plastic.
Photo Wren Vile

This fall we have kept up with our vigorous bed prep schedule, and tomorrow we will finish. Some years it’s a strain to keep up, but we’ve now set a one week-per-bed schedule in place, to reduce stress. This year our problem has been with getting transplants germinated and thriving. We’re now on Plan D! Plan A starts with making sowings on 9/15: ten varieties of leaf lettuce and romaines, chard, pak choy, Chinese cabbage, Tokyo Bekana and Yukina Savoy, in an outdoor bed to be transplanted into the hoophouse in a few weeks. See  Sowing hoophouse winter crops  9/19/2017.

Hoophouse seedlings growing outdoors under insect netting.
Photo Pam Dawling

On 9/24 we sowed ten more varieties of lettuce, Red Russian klae, White Russian kale, Senposai, Yukina Savoy #2, and several frilly mustards (Ruby Streaks, Golden Frills, Scarlet Frills). We also resow anything that didn’t come up well in the 9/15 sowings (Plan B). This year, many crops did not come up well, or at all. Some seed was too old (mistakenly kept at inventory time last November). Some plants were eaten by cutworms.

On 9/30 we resow anything from the 9/24 sowings that didn’t come up well. This is Plan C. We resowed a lot this year. 9/30 is actually a bit too soon to tell if 9/24 lettuce will come up or not, if the soil temperature has cooled down a fair bit already.

Filling the greenhouse beds by barrowing compost along a gangplank.
Photo Wren Vile

We have some spare lettuce plants from the sowings made for our unheated greenhouse beds.They will help us out, as the outdoor seed bed only has half enough plants, and the numbers are going down daily as the cutworms feed!

Lettuce growing in our greenhouse in a previous November.
Photo Wren Vile

Given the situation, we moved to Plan D. This involved sowing plug flats of crops we were still hoping for, setting the flats on one of the empty hoophouse beds, shading them and watering whenever they looked at all dry. The idea is that there are no cutworms here, and the temperature inside the hoophouse is warmer and now more suitable for faster seedling growth. (In September it is often too hot in the hoophouse to germinate lettuce, spinach and some other crops, which is one reason we sow them outdoors).

Plan D: seed flats in our hoophouse on Oct 16, a late attempt to catch up!
Photo Pam Dawling

Usually we would have been busy every late afternoon transplanting all these crops, but because of our rounds of crop failures, we have had more time to devote to the bed prep.

For more about fall hoophouse planting, see these earlier posts:

Fall hoophouse bed prep and shadecloth removal 9/4/18

Hoophouse Bed Prep for Fall Plantings in my Mother Earth News blogpost in August along with step-by-step instructions on using a broadfork, a scuffle hoe and a rake to produce a well-prepared bed with good tilth.

Hoophouse vegetable rotations in my September Mother Earth News blogpost

Planning winter hoophouse crops for our step-by-step process for hoophouse crop planning

What’s growing in the hoophouse 10/10/17

Season Extension and Frost Preparations

Here’s my new Season Extension slideshow that I presented recently for the Allegheny Mountain Institute Farm at Augusta Health and the Center for Rural Culture in Goochland. Click the diagonal arrow icon to see it full screen.

https://www.slideshare.net/SustainableMarketFarming/season-extension-pam-dawling


Frosted daikon radish.
Photo Bridget Aleshire

Since Hurricane Michael passed by, temperatures have plummeted. I dusted off our Frost Alert List. First is the “Grab and Run” list of what to do. Then follows a list of factors to consider to help you forecast whether or not you are likely to get a frost. We take the night-time low temperature for our nearest town (7 miles away) and subtract 5F to predict what temperature we’ll get.

Frost Alert List
Task Crop Notes  
Harvest all edible Asparagus beans
Harvest all edible Eggplant
Harvest all edible Okra
Harvest all edible Tomatoes Incl green
Harvest all edible Peppers exposed to the sky
Harvest all edible West Indian gherkins
Harvest all edible Pickling cucumbers
Harvest all edible Corn
Harvest all edible Green bean plantings past their prime
Thick row cover Late Beans #5,6 Uncover once mild again
Thick row cover Summer squash and zucchini Spring hoops or none. Ditto
Thick row cover Slicing cucumbers Spring hoops or none. Ditto
Thick row cover Celery Double hoops -leave covered
Thick row cover Last lettuce bed Double hoops – leave covered
Set sprinklers Slicer tomatoes Overnight from before 32F till after sun shines on plants
Set sprinklers Roma paste tomatoes and peppers Ditto
Set sprinklers Other vulnerable crops Ditto
Frost is more likely on our farm if. . .
Date is after 10/14
Daytime high temperature is less than 70F (21C)
Sky is clear
Sunset temperature is less than 50F (10C)
Dewpoint forecast (Louisa minus 5) is less than 43F (6C).
Wunderground 3.30pm forecast for Louisa low temp is less than 38F (3.5C)
Little or no breeze (But see last point in list)
Soil is cool and dry
If temps are falling fast, the sky is clear, and it’s windy (esp from NW), it may be polar air moving in and we could get a hard freeze.

Savoy cabbage with frost.
Photo Lori Katz


Frost protection: fundamentals, practice and economics.
Photo FAO

If you want to understand frost  much more than you do, see

Frost Protection: Fundamentals,  Practice and Economics FAO.pdf

126 page resource on methods of frost protection, frost damage physiology, frost forecasting, passive and active protection methods, appropriate technologies, and reference material.

 

 

 


If you are pondering hoop systems for rowcover, here are our winter double hoops. The inner hoop is from 9 or 10 gauge wire, bent round a jig to make eyes. The outer hoop is 22 gauge wire and has the ends bent into hooks. We set the inner hoops every 6′ (2 m) along the bed, fit the rowcover, and roll its edges around wood stakes. then we add the outer hoops, hooking them into the ground-level eyes of the inner hoops. Lastly we tension the rowcover lengthwise. The outer hoops stop the rowcover from blowing away, and hole it in place when we push the edges up to harvest.

Double hoop system for winter rowcover.
Pam Dawling

Frosty rows of greens.
Photo Bridget Aleahire

Alliums for October: plant perennial alliums; harvest fall leeks, eat onions and garlic from storage, choose bulb onion varieties

Fall leek varieties have yellower-green foliage than winter leeks and reach size in less time. We eat ours in October and November. Photo Bridget Aleshire

This is the sixth in my monthly series of Alliums for the Month posts, which run from May to April.

Plant various perennial alliums in October

Plant shallot bulbs between October and November, if your winters aren’t too cold. Mulch them well. We tried to over-winter replanted shallot bulbs, but we got lots of winter-kill. To save bulbs for replanting in early spring, refrigerate them. You can alternatively start shallots from seed in late January in zone 7 and plant in spring.

Divide & replant Egyptian onions & perennial leeks September-November. Plant perennial leeks from dry bulbs a month earlier than divisions: August-October. Perennial leeks take 9-12 months to grow to a good size.


Harvested leeks.
Photo Small Farm Central

Harvest fall leeks in October (and November)

Common leeks are Allium ampeloprasum var. porrum. Leeks come in two main types: the less cold-hardy, faster-growing fall varieties, often with lighter green leaves, which are not winter-hardy north of Zone 8, and the blue-green hardier winter leeks. In the first category, we like Lincoln (50 days to slender bunching leeks, 75 days to mature leeks), King Richard (75 days, fast-growing) and Giant Bulgarian. American Flag has not worked well for us. Giant Musselburgh (105 days) is bolt-resistant, for overwintering in milder climates. For winter leeks we like Tadorna (100 days), Jaune du Poiteau, King Sieg (84 days, a cross between King Richard and the winter-hardy Siegfried, from Fedco) and Bleu de Solaize (105 days, very hardy).

Leeks can be harvested whenever they seem big enough. To feed a hundred people, we like to have one bed of 1080 leeks for harvesting each month, from October to February. We grow two beds of fall leeks and three of winter-hardy ones. About ten leeks each, each month.

When harvesting leeks, remember how deep you planted them and try to avoid spearing them. Put the tines of a digging fork (spading fork) vertically down in the ground 2″–3″ (5–8 cm) away from the leeks. I try to dig up two at once for efficiency. Step on the fork and lever back until the leeks move. Impatient pulling of unloosened leeks leads to broken ones. Remove one leek, chop off the roots, invert the plant and cut the leaves in a V shape, so that the tougher outer leaves are shortest and the younger inner leaves are longest. Clean up any obviously inedible outer layers, then put the leek in a bucket. We put an inch (2.5 cm) of water in the bottom of the bucket (to keep the leeks hydrated) before taking the leeks to the cooler. If the ground is frozen too deep to pierce the crust with the fork, you may be able to harvest a few leeks for immediate use by pouring boiling water along the row at the base of the plants. This does not seem to damage the leaves.

Read about the early summer task of planting leeks here.

Other October allium harvests

Harvest and eat large perennial leeks, and leaves of Egyptian onions and smaller perennial leeks September –April, whenever they are large enough.


Australian Brown onions.
Photo Southern Exposure Seed Exchange

Eat onions and garlic from storage

Eat the non-storing onions and the hardneck garlic first. Sort through your bulb onions once a week or so, removing any that are having troubles, before the trouble spreads to other bulbs. Then work your way through the non-storing varieties such as Ailsa Craig, Walla Walla, etc.

Silverskin softneck garlic varieties store up to 12 months under the best conditions. Most softneck garlic stores for longer than the 4-6 months that most hardnecks will. (Music and Chesnok Red can keep 7 months or more here in central Virginia.)

Read more about garlic and onion storage in the September Allium of the Month post. Here’s the headlines:

  • Not too dry, not too damp.
  • Above 60–70°F (15.5–21°C) or below 40°F (4.4°C) for garlic; 60–90°F (16–32°C) or below 41°F (5°C) for bulb onions. Do not freeze. (Chilling injury at 31°F)
  • Avoid 40–56°F (4.4–13°C) for garlic, avoid 45–55°F (7–13°C) for bulb onions

Other resources on harvesting, curing and storing alliums

Garlic Harvest, Curing and Storage https://ag.umass.edu/vegetable/fact-sheets/garlic-harvest-curing-storage

Onion Harvest and Storage https://ag.umass.edu/vegetable/fact-sheets/onions-harvest-curing

Alliums, Post Harvest and Storage Diseases https://ag.umass.edu/vegetable/fact-sheets/alliums-post-harvest-storage-diseases

Special Allium Topic for October: Choosing bulb onion varieties

Regular bulb onions are a biennial crop grown as an annual (A. cepa var. cepa). This botanical group includes bulb onions, scallions (spring onions, salad onions or escallions), and the small pickling onions (cipollini).

A fine bed of onions in spring.
Photo Kathryn Simmons

In our location the best time to sow bulbing onion seed is early November in our hoophouse. After over-wintering, we transplant them outdoors at the very beginning of March. (More on sowing onions next month.) If you want to sow in November as we do, now is the time to choose varieties. Factors include latitude, temperature, flavor preference and whether or not you hope to store onions or only grow for fairly immediate eating.

Latitude

Onions have three separate phases of growth — vegetative, bulbing and blooming — and the switch from one phase to the next is triggered by environmental factors, mostly day-length and temperature. To grow large bulb onions it is important to produce large healthy plants before the vegetative stage gives way to the bulbing stage. If plants are small when bulbing starts, only small bulbs can result.

Be sure to choose varieties suited to your latitude, because onions are daylength sensitive. Varieties are classified as short day, intermediate day, or long day types, depending on the daylight length at which they start forming bulbs (assuming suitable temperatures): 10-12 hours, 12-14 hours, 14-16 hours. Onions bulb earlier at warm temperatures than at colder temperatures. More catalogs are now including the information on the latitude adaptation of their varieties.

The further north you are, the more hours of daylight you have in summer. Here, our longest day (summer solstice) has 14 hours and 46 minutes of daylight. We have 14 hours of daylight six weeks earlier, on May 6. A few varieties of long-day onions can be grown here, but those requiring 15 or 16 hours of daylight will never form bulbs at this latitude. South of their ideal growing region, long-day onions don’t start bulbing until triggered by the very longest days (near summer solstice) and the bulbs get too hot in July as they mature.

Short-day onions start to bulb at 10–12 hours of daylight, provided temperatures are warm enough. If short-day onions are grown too far north (where it is too cold to overwinter them, and they must be started in spring) they will bulb before much leaf growth has occurred, and so the bulbs will be small. At our latitude (38°N) neither long-day nor short-day onions are ideal.

Temperature – avoiding bolting onions

The trigger for the transition from bulbing to flowering (bolting) is temperatures below 50°F (10°C) for three to four weeks, after the plants have six leaves or more (pencil size). This is especially true when rapid growth is followed by a period of cool weather. The chilling effect appears to be cumulative over time. Hence you can see that to avoid bolting it’s important your seedlings don’t get too big too early in the winter. And that you give them extra protection if there is a long cold spell in spring before you plant them out. Daylength does not affect bolting.

For us to succeed with bulbing onions we need to produce transplants the thickness of thin pencils (⅜” or 1 cm) on March 1, our earliest possible date for planting outdoors. This gives the plants time to grow large before bulbing is triggered. Starting from seed in January didn’t give us time to grow big vegetative plants, therefore not big bulbs either. Starting plants in the fall and keeping them in coldframes or outdoors under rowcover gave us too much winter-kill. Once we discovered the method of using our hoophouse to keep little onions alive over the winter we were very happy.

We have sown bulbing onions for growing to maturity in the hoophouse, and, more often, we have grown onion seedlings for planting outdoors.

Other factors in choosing onion varieties

“Days to maturity” numbers in catalogs are generally for spring planting once conditions have warmed to the usual range for that crop. When growing late into the fall, add about 14 days for the slowdown in growth, and when growing over the winter, precise calculations go out the window!

Beware of white onions, which can get sun-scald, if growing them to maturity in a hoophouse.

Walla Walla onions
Photo Southern Exposure Seed Exchange

Varieties for storage and fresh eating

We have to accept that hard storing onions cannot be grown in the south. At 38°N, some varieties that worked well for 6 month storage for us include: Gunnison, Frontier, Copra as the best three, then Patterson (Hybrid. High yield potential. 38°–55° latitude) and Prince. Prince has since been replaced by Pontiac, a large onion with strong skin, thin necks, suitable for 36°–50° latitude. We had only 50% success with Red Wethersfield and Cabernet. Some non-storing good ones for us include Ailsa Craig (OP aka Exhibition. High yield. Large. 33°–40° latitude), Walla Walla, Olympic, Bridger (Hybrid. Replaces Olympic. 35°–50° latitude), Expression. Varieties come and got. Australian Brown is one that sounds good, but I have not tried it.

More info on bulb onions

See Sustainable Market Farming for more on onions in general, including diseases.

See the Texas A&M AgriLife Extension publication Onion, by Joe Masabni. I don’t endorse the chemical pesticides mentioned, but the information on growing onions is very sound.

Feeding the Soil Slideshow, Hoophouse Crop Rotations, Growing for Market Magazine

Tall sweet pepper plants in our hoophouse in early October. Photo Pam Dawling

First a photo of a couple of sweet pepper plants in our hoophouse. They are looking a bit “back-end-ish”, but are still producing fruit. We plan our rotation so that the bed which had peppers during the summer is the last to get planted to greens. This lets us get the most peppers possible. Plus, preparing the other beds keeps us fully occupied.

This week’s post is a catch up on various topics. I have been busy with speaking events (see my Events page at the tab on this site), and the busiest time of the year in the hoophouse, preparing to plant the winter greens.

On the topic of hoophouse vegetable crop rotations, I have just posted something on the Mother Earth News Organic Gardening blog. There are two lovely pairs of photos, winter and summer, demonstrating crop rotations.

Hoophouse beds in November.
Photo Ethan Hirsh


Heritage Harvest Festival

At the Heritage Harvest Festival I spoke on Feeding the Soil. Here’s my slideshow on that. Click the diagonal arrow icon to view it full screen.

Last weekend I presented Season Extension for the Allegheny Mountain Institute Farm at Augusta Health, and I will be presenting that topic again this weekend at the Center for Rural Culture, Goochland, VA 23063.

I will include that slideshow in a couple of weeks. Next week is my Alliums for October post.


I haven’t found much reading time lately, so a magazine is just the thing! I’ve finished the September Growing for Market and am just moving on to the newly published October issue.

The September issue starts with an article on profitable bouquet making (something I’ve never tried to do) by Erin Benzakein. She gives ingredients for each season, “recipes”, and systems for ergonomic working. Spencer Nietmann writes on managing seasonal farm income using a cash projection spreadsheet. If you see yourself heading for disaster, you delay buying equipment and move that expense later in your projection. Simple and effective. No bad surprises! He also advocates for using zero interest credit cards short-term to pay for an expense you are confident you can pay for before the end of the free period. His example is paying for a hoophouse until the NRCS EQIP grant money came through.

Ellen Polishuk’s Farmer-to-Farmer profile is Blue House Farm in California. Franklin Egan writes on strategies to grow organic matter levels and reduce tillage at the same time. This is to help answer the challenges of some farmers on new land that was previously in continuous industrial corn production. The farmers were growing impressive bulky cover crops in sequence, but needed intensive tillage to get those covers incorporated. This tillage knocked back the organic matter levels each time. They used a farm walk to invite other farmers to suggest improved methods to bring their land into good heart.

Sam Hitchcock Hilton wrote about an urban farm in New Orleans using events and farm meals to develop interest in their vegetable sales. It is written in the voice of the farm goat, which adds an entertaining touch.

The October issue starts with an Introduction to Korean Natural Farming, which was a new topic to me, and may well be new to most of you. The method includes indigenous microorganisms, or “bugs in a jug” (a fermentation process is used). You can learn how to try this for yourself.

Jed Beach writes about his top crops for profitable wholesaling. His hypothesis is that “there are four factors that predict which crops can be competitively profitable for small farms to grow, even at close to distributor prices.” Perishability, matching planting to sales, gross sales per square foot and gross per harvest-and-pack hour. He provides a chart of his seven most profitable seven least profitable crops assessed on these factors. Thought-provoking stuff.

Ellen Polishuk’s Farmer-to-Farmer profile this month is Sassafras Creek Farm in Maryland, with 6 acres of vegetables and 17 acres of grains. The farmers there have a clear system of employment expectations and benefits, and instructions. Half of farm sales come from a farmers market and the other half come from wholesaling to restaurants, natural food stores, caterers and other farms’ CSAs. They decided early on that running their own CSA was not for them.

I was startled by the next article: “You don’t need a high tunnel to grow ginger” from three growers in the Midwest. (“Surely you do”, I thought). They used grant money to test out growing ginger in low tunnels, some with in-ground heating coils, some with in-ground foam insulation. Soil temperature is key (60-85F). But, personally, I’d still rather have a high tunnel!

Doug Trott wrote about planning and ordering now for next year’s flower crops – useful tips for flower growers everywhere.

Book Review: Start Your Farm, by Forrest Pritchard and Ellen Polishuk

Start Your Farm: The Authoritative Guide to Becoming a Sustainable 21st Century Farmer.  Essentials for Growing and Raising Vegetables, Fruits, Livestock, Grains for Market. Forrest Pritchard and Ellen Polishuk, The Experiment, New York. ISBN 978-1-61519-489-6

This is a book for new farmers, from two Virginia farmers. It is not an instruction manual on growing crops or raising livestock, nor on accounting and marketing. It is a book of suggestions on what aspiring sustainable farmers need to ponder, reflect on, take a cold hard look at before starting a farm of their own. It is a hybrid of insights, self-help wisdom, business savvy, and experience at the pointy end. The book addresses the huge problem of finding affordable land, and coming up with retirement plans that let you pass the farm down to the next generation, rather than selling it so you have a retirement fund. Their goal is to inspire as many new farmers as possible, so the focus is on small-scale manageable operations, which can provide success, and a very satisfying, joyful experience, along with the long hours of hard work.

The last chapter of the book, “Go!” can stand alone as a wonderful encouragement to new or beginning farmers – or actually old and retiring farmers too! The chapter is beautifully poetic. It leads us step by step through Your First Day, Your First Harvest, Your First Sale, imagining what that will be like. Next follows the caution: “It’s not rainbows and sweet breezes all the time.” Here’s encouragement to be prepared, to do what you have to, to respect the forces of nature, and be ready for the amazement, the unexpected awe and respect for nature. “The only thing we know for sure is that when we pour our passion into what we love, we end up with more than we give.”

Forrest Pritchard

Forrest is a seventh-generation farmer, raised on a 2000 acre farm that has provided corn, soybeans, apples, cherries, cattle, pigs, chickens. When his turn at the helm came, he transitioned the farm to sustainable livestock. Ellen is a first-generation farmer, growing vegetables since she was a teenager. She was hired in the 1990’s to manage one arm of Potomac Vegetable Farms, and went on to own this much admired and successful operation. This book provides different sorts of wisdom from each author. Hence each writes the chapters they have most expertise in, with some cross-fertilization of ideas. Both are very engaging writers.

Ellen Polishuk

As recently as 100 years ago, almost 40% of Americans were full-time farmers. Today it is less than 2%. The responsibility for feeding our society rests on the independent, altruistic farmers who devote their efforts to produce food for everyone else. Forrest calls them volunteers.

The authors caution that farming is for pragmatists, not perfectionists. Getting something 100% right in farming is not only rarely possible, it’s also rarely necessary. It’s better to be able to hoe beans quickly, with a few casualties, than to spend forever hoeing perfectly. There’s just too much to get done in a timely way. Good enough is better than perfect. Time is as valuable as money. In the short-term, you may be able to use off-farm income to help you get your farm up and running. Long-term (or sooner!) you’ll need to make enough for the farm to pay for all work done, and also make a profit (for retirement, kids’ college fund, a new tractor, another hoophouse).

Each chapter ends with a few searching questions, to help you get the most out of what you just read. Questions to help you assess your strengths and weaknesses, explore things you were ignoring and generally prepare yourself for the exciting huge task ahead. They also caution against biting off more than you can chew initially. Don’t grow every vegetable and flower and raise every possible kind of livestock! Start simpler and build up to your ideal level of diversity.

Don’t assume you should start by buying land. Life will be easier if you find land to farm that you don’t have to buy. The key is access to land, not acquisition, and the authors provide many models of how this can come about. There is a whole generation of farmers who want to retire, help a new generation of farmers start farming and see their land continue in agriculture. Debt-financed land purchasing is their least-recommended route. If that’s what you have to do, bypass conventional banks, go to the Farm Services Agency, which offers farm-friendly financing options, or look around for companies specializing in loans to farmers.

Forrest explains the blind-spot many of us have about compensating for the value of the land. The land, as an investment, needs to provide a financial return, in the same way that you’d expect from a pile of cash equal in value to the land. You wouldn’t leave the pile of cash under the mattress – you’d invest it so it would grow in value at least as much as annual inflation. And yet it can be hard to see that if we don’t get a similar return from a piece of land, it becomes an asset that steadily loses value that we are subsidizing with our time.

Forrest explains how the nation came to expect cheap food, and the consequences this has for farmers, and farming land. He explains how, from the sixteenth century onwards, land in North America was given free (we know who they took it from) to those favored by the people in power; to soldiers returning from the Revolutionary War; to those willing to farm in Florida (by Spain), or California (by Mexico); and then under the 1862 Homestead Act 270 million acres were given to 1.6 million farmers, a practice that continued as late as 1986 in Alaska. This lead generation after generation to not account for the value of the land properly. And so, cheap lettuce, cheap hamburgers, and a big challenge for farmers today to make a living and buy land.

Ellen writes an important introduction to soil physical composition, chemistry, biology, and explains replacing nutrients removed in crops. When visiting potential farms, give the soil good attention. This topic comes up again when Forrest writes about the importance of “putting things back” whether that’s tools or soil nutrients.

Ideas of complete independence and creative freedom as farmers can be a figment of our imaginations. We get a clear explanation of the Chicago Mercantile Exchange and how this is going to have effects (which we have no control over) on our costs and our income. Your hard-striven-for crop might end up losing in the competition with an imported bumper crop being sold at rock-bottom prices. I’m also thinking about this year’s US soybean farmers whose markets in China have been strongly damaged by tariffs. For maximum independence from uncontrollable factors, look for sustainable markets that are less dependent on mainstream commodity system supplies or outlets. Identify a need, find the angle that is the best fit between your local customer and your strengths, foster your relationships.

Ellen’s chapter on Tai Chi Economics suggests methods to deal with uncontrollable outside economic forces, such as regional competition, government policies, national drought, international competition. What we can charge for tomatoes in Oregon is impacted by the price of natural gas in Pennsylvania, or the wages of underpaid farm workers in Florida. In Tai Chi, use grace to meet incoming force, engage that force until it wears itself out, and learn from your opponent. “The soft and the pliable will defeat the hard and the strong” (Lao-tzu). Develop holistic skills to make a profit while growing nutritious food for the world. “Those who say it can’t be done should not interrupt those who are doing it.”

“Profit” is not a dirty word – profit allows the farm to grow and develop, pay decent wages, and provide security in case of disaster, and generally fund your life. The Tai Chi opportunity: make a profit while achieving the triple bottom line of a sustainable business: ecological stewardship, social justice, and economic viability.

Veggie Compass is a free farm management tool for diversified fresh market vegetable growers. It uses a spreadsheet to help farmers compute the real costs of growing a hundred crops and several different marketing channels. This tool can help farmers find which crops are their most successful, and which are the losers. The choices become clearer. If you are selling eggs at $6 a dozen, but they cost you $7 to produce, you’d do better just handing out dollar bills and not keep the hens at all. Let the antiquated notion of cheap food flow right past you! No other business apologizes for supplying a high quality product at a fair price. Record-keeping (noticing and writing down what happens and how well it worked) enables you to make improvements, rather than random changes.

Forrest introduces the Money Triangle. Financial stability depends on your potential to earn money, save money, and give money, in a balanced way. Savings are the catalyst for financial success. He suggests the 10% Plan. Make at least 10% net profit, save at least 10% of the profits (invested at 10% interest), give away 10% of what your investments make for you. It’s also a good rule for debt: never borrow more than 10% of your gross annual income, or pay more than 10% interest, preferably not more than 5%.

Three rules for beating the odds in farming: 1. If it’s broken, stop and fix it (relationships as well as tools); 2. Put it back where you found it (soil nutrients as well as tools); 3. Do what you say you are going to do (your customers’ trust, as well as faith in yourself.)

Forrest points out the wisdom of accepting that you won’t be able to function as a superior producer, an excellent bookkeeper and an all-star salesperson for more than a couple of years – you will need to get some help. Perhaps temporarily hire a professional salesperson who seems a good match, to identify good sales channels for you.

Ellen writes on Love, Work and Harmony. Grumpiness should be reserved for the time working alone! Build up relationship skills, you’ll need them with workers, friends and customers. To earn an annual income of $40,000 to $50,000, you would need to grow, harvest and market $125,000 worth of agricultural products. This is very difficult for one human alone. You need a workforce, and for that, you need good communication. Interns are students, not unpaid workers. The farmer has an obligation to educate, coach, encourage, and train any interns. This takes time away from production. Communication dramas can be the hardest part of farming. Learn early on how to speak your truth without criticism or blame and learn how to listen without taking offense. Keep time for the important people in your life, learn to leave the stresses outside your house, stick to daily finishing times. And don’t expect too much of yourself. “If you think you can farm and parent small children at the exact same time, you are doing neither activity well.” (Jean-Martin Fortier). If you have more than six people working for you, then keeping them, happy and productive is a full-time management job (Chris Blanchard). Don’t expect to cope with farming on your own in a place where you don’t know anybody – make a priority of finding folks to connect with.

Forrest writes on the Beautiful Paradox of Failure. No two seasons are the same. “Sustainable farming is built around the expectation that things change, that adaptability and innovation remain paramount, and that failure, when it occurs, is a critical teaching tool.” Failure arrives in many forms, despite all efforts to prevent it. And yet, without failure, we are less likely to improve. Forrest also discusses failures of faith, periods of despondency (mostly during droughts). He invites us, in the end-of-chapter questions, to think back to our biggest failures, how they shaped us, what we learned, and whether it still feels like a failure, in hindsight. Mine was the year I left the sweet potatoes in the ground too late, hoping for more growth to make up for a late start. Fall turned wet and cold and the sweet potatoes rotted or got chilling injury. It was a big mess. I learned a lot more about sweet potatoes as a result. It does still feel like a failure, although one of understandable ignorance. No-one around me knew any better at that time. I think it lead to me doing more research and record-keeping, perhaps even helped shape my path as a writer.

Ellen writes about how to appreciate the beauty around us, the daily moments of wonder, and our healthy lifestyle, although perhaps not the midnight struggles in the rain to set some emergency to rights. We do learn that it doesn’t matter if we have a headache, or feel lazy or sad, somethings just have to be done. Ellen calls this the priority of biology over attitude. We can call upon the grounding resources of clean air, vibrant plants, as remedies for our off days. We know producing food is a good and noble cause. If you read the final chapter first, read it again now!

Lettuce slideshow, Mother Earth News Fair, FaceBook Live, Top summer blogposts, upcoming events

We drove home seven hours from the Pennsylvania Mother Earth News Fair yesterday through the rain. The remnants of Hurricane Florence. We were among the lucky people. Earlier forecasts for Florence had the hurricane raging across central Virginia.

At the Fair, I gave two workshops: Fall and Winter Hoophouses and my new Lettuce Year Round, which you can view right here. Click the diagonal arrows icon to get a full screen view.

I had a bit too much material for a one-hour time-slot, so those of you who were there and felt disappointed at what I had to leave out, you can see it here.

While I as at the Fair I did a FaceBook Live Interview about gardening in hoophouses, with another author, Deborah Niemann. Look on Facebook for Deborah Niemann-Boehle or click the topic link above. She has several books: Raising Goats Naturally, Homegrown & Handmade, and Ecothrifty.

Shade cloth on a bed of lettuce in summer.
Photo Nina Gentle

Meanwhile, Mother Earth News tells me that my post 20 Tips for Success in Germinating Seeds in Hot Weather is in third place for most popular posts this summer.

The winner  An Effective and Non-Toxic Solution for Getting Rid of Yellow Jackets’ Nests by Miriam Landman got 43,328 views in 3 months!

Weeding rowcovered spinach in winter.
Photo Wren Vile

Looking at my own website statistics, I find that for this week, the most popular posts are

  1. Winter Kill Temperatures of Winter-Hardy Vegetables 2016
  2. Soil tests and high phosphorus levels
  3. How to deal with green potatoes
  4. .Winter-Kill Temperatures of Cold-Hardy Vegetables 2018
  5. Alliums for September

For all-time, the bias is naturally on posts that have been around longest,

  1. Garlic scapes! Three weeks to bulb harvest! Is most popular, followed closely by
  2. Winter Kill Temperatures of Winter-Hardy Vegetables 2016.
  3. How to deal with green potatoes is still #3.
  4.  The Complete Twin Oaks Garden Task List Month-by-Month,
  5. Harvesting Melons
  6. Book Review, Epic Tomatoes by Craig LeHoullier
  7. Wnter Hardiness
  8. Book Review: The Lean Farm by Ben Hartman and
  9. Setting out biodegradable plastic mulch by hand

Rolling biodegradable plastic mulch by hand
Photo Wren Vile

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I’ve updated my Events page again, now that the September- April  “Events Season” has hotted up. I’ve added in a couple of new ones and updated some others. Click the Events tab to find conferences and fairs near you, and be sure to come and introduce yourself!

Ira Wallace of Southern Exposure Seed Exchange, at the Heritage Harvest Festival Tomato Tasting.
Photo courtesy of Monticello

The Heritage Harvest Festival  is September 21-22 Monticello, near Charlottesville, Virginia

I’m giving a Premium Workshop on Friday Sept 21, 3-4 pm Classroom 7. Click the link HERE to book for that.

Feeding the Soil

In this workshop I will introduce ways to grow and maintain healthy soils: how to develop a permanent crop rotation in seven steps, and why your soil will benefit from this; how to choose appropriate cover crops; how to make compost and how to benefit from using organic mulches to feed the soil. Handouts.

Book-signing Friday 4.15 – 4.45 pm.

On Saturday there are events all day from 10am to 5pm. $26 general admission.

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Saturday September 29, 2018  Allegheny Mountain Institute Farm at Augusta Health,  Fishersville, VA 22939. 9 am – noon

I’m giving a two-hour Class on Season Extension, followed by one-hour Q&A teaching tour of the hoophouse and greenhouse.

Alliums for September: plant potato onions, sow ramps, eat Welsh onions, move stored garlic

Potato onion plant with young shoots.
Photo by Kathryn Simmons

Alliums to Plant in September

Divide and replant Egyptian onions and perennial leeks

Divide and replant perennial alliums in September (August-October) to increase the size of the patch and get more next year.

Plant large potato onions (2-2½”, 5-6 cm)

  • It’s better not to try to store very large potato onions over 2½” (6cm) for planting, just eat them (they sprout easily).
  • All large potato onions store poorly, so keep planting stock in the refrigerator until planting in late September or early October. Jeff McCormack does not recommend planting before September.
  • For 360′ (110m) @ 8″ (20cm) you need 540 bulbs plus 30%-40% spare. Approximately 760 bulbs. 150 large bulbs weigh about 25# (11kg)
  • Plant them at 8″ (20cm). If there are not enough large onions available, increase spacing or fill out with medium onions.
  • Cover with ½-1″ (1-2cm) soil, and add 4″-8″ (10-20cm) mulch.
  • Refrigerate any leftovers for November planting with the medium-sized onions, or eat or sell now.
  • Yields can be 3 to 8 times the weight of the seed stock, depending on growing conditions.
  • Individual bulbs can be grown indoors in a pot to produce a steady supply of green onions during the winter.

Sow ramp seeds in woodlands

Mature harvested ramp plants.
Photo Small Farm Central

In zones 3-7, sow ramps seed during August and September (see August blogpost)

Ramps (also known as Wood Leeks or Wild Leeks) are a native woodland perennial, and can be found throughout the eastern-half of the United States, as far west as Oklahoma and as far north as the central and eastern provinces of Canada.

Ramps, (Allium tricoccum) have some of the flavor components of leeks, onions, and garlic. There are projects to re-establish ramps in a number of regions in the Eastern United States.  Carriage House Farm is one such attempt by Grow Appalachia, which is a program of Berea College in Kentucky, Grow Appalachia works with farmers, gardeners, ranchers, and conservationists across a five state area to reintroduce old native and heirloom species of plants.  Ramps is/was one plant in this program. It takes two years for ramp seeds to germinate and another 2-3 years till they hit harvestable levels.

Having Your Ramps and Eating Them Too is a book by Glen Facemire

Alliums to harvest in September

Harvest Egyptian walking onions (topset onions, tree onions) for pickling, leaves of Egyptian onions and perennial leeks (September-April for cutting those)

Egyptian onions produce tiny red-purple bulbs in the umbel instead of flowers, and were previously named Allium cepa var. proliferum. According to Wikipedia, they are now known to be a hybrid of A. cepa and A. fistulosum.

Japanese bunching onion and Welsh onion (native to China, not Wales) are Allium fistulosum. They are sometimes used as scallions, as are some A. cepa bulbing onions. Young plants of A. fistulosum and A. cepa look very similar, but may be distinguished by their leaves, which are circular in cross-section in A. fistulosum rather than flattened on one side.  A. fistulosum has hollow leaves (fistulosum means “hollow”), scapes and does not develop bulbs – the leaves are the part that is eaten. Welsh onions are also known as cibol, chibbles (in Cornwall), escallion (in Jamaica), negi (in Japan), pa (in Korea), as well as green onions, salad onions, spring onions,. These general last names are also used for other kinds of onions where the leaves are the part eaten.

Perennial leeks are Allium Ampeloprasum. Common leeks are Allium ampeloprasum var. porrum (more about leeks in October and March). Elephant garlic is botanically a leek (A. ampeloprasum var. ampeloprasum).

Other Allium Tasks for September

See Alliums for August for more on all of the following jobs which continue into September:

  • Snipping and sorting garlic and potato onions
  • Trimming, sorting and storing bulb onions
  • Eating onions and garlic from storage
  • Inspect onions and garlic at least once a month. Remove bulbs which are sprouting or rotting or else the whole batch may spoil.
  • At the end of September I make the decision about how many potato onions to keep back for planting (see August for our calculations).
  • We also move garlic from warm storage to cool storage (more info below)

Potato onions store very well through the winter so long as they are well-cured, dry, well-ventilated, and not packed over 4″ deep. Ideal conditions are a temperature between either 32–41°F (0–5°C) or 50–70°F (10–21°C) with 60-70% humidity.

Polish White – our softneck garlic variety.
Credit Southern Exposure Seed Exchange

Special Allium Topic for September: Garlic Storage

Before trimming your garlic, I hope you were sure it was fully cured, and you set aside any non-storing bulbs, such as those with damaged cloves, or any over-mature, springing-open bulbs. It usually works to select your seed-stock bulbs at the same time.

Commercially, garlic is stored in the dark at about 32°F (0°C) and 65% humidity, and depending on the species and variety, it may keep six months or more. I have heard that garlic can be stored for up to nine months at 27°F (-2.7°C), but I have not tried that myself. It does not freeze until 21°F (-6°C). Do not store peeled garlic in oil, as garlic is low in acidity and the botulin toxin could grow.

For storage, garlic (like onions) does best with a humidity of 60%–70%. Refrigerators are usually more humid than ideal.

Garlic will sprout if kept in a temperature range of 40–56°F (4.4–13°C), or if it is allowed to get cold then warm. So long as temperatures remain over 56°F (13°C) you can store garlic almost anywhere. You can use an unheated room in your house, a root cellar, garage, etc. Maintain good air circulation. Most varieties store reasona­bly well in a cool room if hung from the ceiling in mesh bags, or spread on shelves in a layer less than 4″ deep.

In our climate, with a long period in the danger zone temperatures of 40–56°F (4.4–13°C), we keep alliums in the warmer storage range (60-70°F (15.5-21°C) or hotter) in a basement until late September or sometime in October when ambient temperatures in the basement drop close to 56ºF (13°C). We then move our eating garlic from the basement to the walk-in refrigerated cooler at 32–41°F (0–5°C), 95–100%. The low shelves in the cooler near the compressor are damper and do not work well. We use the high and dry shelves.

Juggling space for various crops, moving the garlic out of the basement makes space available for the winter squash harvests in September and October. By this time most of the apples from the walk-in cooler have been eaten, and space is available there. Also there is no longer the problem of ethylene emitted by the apples, which causes garlic to sprout. Ideally ripe fruits and garlic would never be in the same storage space.

Softneck garlics store longest. Silverskins store up to 12 months under the best conditions. Most hardnecks last 4-6 months but Music and Chesnok Red can keep 7 months or more here in central Virginia.

Storage of Seed Garlic

We store our seed garlic on a high shelf in the garden shed, at quite variable ambient temperatures, where it does fine until late October or early November when we plant it. Seed garlic does not require long-term storage conditions! The ideal storage conditions for seed garlic are 50-65°F (10-18°C) and 65-70% relative humidity. Storing in a refrigerator is not a good option for seed garlic, as prolonged cool storage results in “witches-brooming” (strange growth shapes), and early maturity (along with lower yields). Storage above 65°F (18°C) results in delayed sprouting and late maturity.

Siberian garlic.
Photo by Southern Exposure Seed Exchange

Fall hoophouse bed prep and shadecloth removal

Our hoophouse is covered mid-May to early-September with a large shadecloth.
Photo Twin Oaks Community

Today we’re removing the giant piece of shadecloth that has been over the top of our hoophouse since mid-May. We’ll unclip the ropes, roll them up, then pull the shadecloth off onto the ground, roll and bundle it up. It’s important to store it so mice can’t get into the bundle and make holes. We already have a few of those!

The shadecloth is held on by ropes zig-zagging between snap grommets on the shadecloth and large hooks on the baseboard.
Photo Twin Oaks Community

We’ve just finished preparing the first of our 7 hoophouse beds for the winter greens. Crops grow so fast in the hoophouse, and the organic matter in the soil is consumed at a rapid rate. Every new crop requires a fertility boost. In the fall, we prepare our beds by removing all the summer crops, and spreading four or five wheel­barrows of compost per 4′ × 96′ (1.2 × 29 m) bed. This is a generous 46 gals/100 ft2 (or 680 L/36 m2 bed)or more. A full wheelbarrow generally holds six cubic feet (44 gallons or 170 liters). 1 ft3 = 7.5 US gals. An inch of compost is about 8 ft3/100 ft2, or 60 gals/100 ft2; 20 gals/100 ft2 is 15 tons/acre (8.6 L/m2). Other professional growers use any­where from 12–40 gals/100 ft2 (5–17 L/m2). Some use much more.

There are 3 concerns about using too much compost: high phosphorus levels, raised salt levels and nitrate accumulation. Some growers like to do two years of high compost rates (40 gals/100 ft2, 17 L/m2 or more), then reduce the rate to half that and add fish or kelp, at only 5 oz–8 oz/100 ft2 (15–24 gm/m2) per year. Sustainable alternatives to compost in­clude organic pelleted chicken manure, alfalfa meal, etc.

Broadfork from Way Cool Tools.
Photo Way Cool Tools

A few years after we put up our hoophouse,  we noticed that despite our best efforts, we were walking on the edges of the beds and compact­ing them. Initially we simply loosened the edges of the beds with a digging fork. We then noticed that the plants on the edges grew better, and we realized the whole bed width needed loosening. If you have designed your hoophouse to use trac­tor equipment there, that will deal with soil com­paction. We wanted our hoophouse to be free of internal combustion engines and fossil fuels, and the broadfork has provided the solution. Ours is an all-steel broadfork from Way Cool Tools. We do an annual broadforking each fall, before planting our winter greens.

We set nylon twine to mark the bed edges, holding it in place using sod staples. The string alone has not been enough to stop us walking on the bed edges. Loose soil is important because our winter crops grow all the way to the edges of the beds. After spreading compost, we broadfork the beds, then vigorously work the compost into the top of the soil with scuffle hoes and rakes. We learned the hard way the importance of raking the soil to a fine tilth immediately after broadforking — you don’t want to let the broadforked clumps dry out into bricks before you rake! See the photo below and imagine what could happen!

Hoophouse bed broadforked to aerate the soil without inverting.
Photo Pam Dawling

I wrote about our bed prep method and tools, and also our outdoor sowings for transplanting into the hoophouse, with a special focus on suitable lettuce varieties in my post Sowing hoophouse winter crops here in Sept 2017.

We have just started planting our late fall, winter and early spring crops in the hoophouse. We are  pre-sprouting our spinach for a week in a jar in the fridge. Soak the seed overnight, drain it in the morning, fit a mesh lid on the jar, and lay it on its side in the fridge. Once a day, give the jar a quarter turn to tumble the seeds and even out the moisture. If the seeds are a bit wet when you need to sow them, and clumped together, pour them out on a cloth to dry a bit before sowing.

We will sow five crops in our first bed on September 6 and 7– spinach, tatsoi, Bulls Blood beet greens, radishes and scallions. On September 15 we sow lettuces, chard, pak choy, Chinese cabbage, Tokyo Bekana and Yukina Savoy, in an outdoor bed to be transplanted into the hoophouse in a few weeks, after we’ve prepared another bed.

We plant crops closer in the hoophouse than outdoors, and closer to the edges of the beds. We don’t have many weeds in the hoophouse, and the paths are marked off with twine, to keep us from stepping on the beds. We find that the soil does slump and compact some of its own accord, even if we don’t step on the edges (and of course, some feet do find themselves on the bed edges), hence the once-a-year broadforking.

Young spinach plants (and henbit!) in our hoophouse in December. This is our second sowing, not the early September one.
Photo Pam Dawling

Step-by-step guide to hoophouse fall bed prep:

  1. Remove the summer crops to the compost pile,
  2. Spread a generous layer of compost over the whole bed surface.
  3. Gather the soil staples and move the drip tape off to one side or the other,
  4. Broadfork the whole bed, but not all at once. Only broadfork the amount of space you have time to rake immediately, otherwise the warm hoophouse conditions dry out the soil and make it harder to cultivate into a fine tilth, which is the next task. We tackle 1/3 bed each day.
  5. To use a broadfork, go backwards working the width of the bed. Stab the tines into the soil and step on the crossbar, holding the long handles. Step from foot to foot until the crossbar touches the soil, with the tines all the way in, then step off backwards, pulling the handles towards you. This loosens a big area of soil, which hopefully crumbles into chunks. Lift the broadfork and set it back in the soil about 6” (15 cm) back from the first bite. Note: you are not inverting the soil – this is not a “digging over” process. Step on the bar and repeat.
  6. Sometimes we use a rake, breaking the clumps up with the back of the rake, then raking the soil to break up the smaller lumps, and reshape the bed. More often we use a wide stirrup hoe very energetically. This isn’t the job stirrup hoes were designed for (that’s very shallow hoeing), but the sharp hoe blade does a really good job of breaking up clumpy soil.
  7. We’ve found it important to lay the drip tapes back in place in between each day’s work, so that the soil gets irrigated when we run the system and stays damp. We don’t want dead, baked soil.
  8. When the bed is prepared, we measure out the areas for different crops and mark them with flags.
  9. Next we use our row-marker rake (bed prep rake) from Johnny’s Selected Seeds.
  10. After the rowmarking, we deepen the furrows if needed (often it’s not needed), using a pointed hoe, then sow the seeds.

For more on winter hoophouse crops, see

Planning winter hoophouse crops for our step-by-step process for hoophouse crop planning

Cold-tolerant lettuce and the rest, our January 2018 assessment of the varieties we grew that winter and which survived the unusually cold spell we had.