This week I’ve been marveling at Ruby Streaks, a beautiful ferny dark red leafy salad vegetable growing in our hoophouse. It brings a smile to winter salad mixes, a refreshing change from all the earnest shades of green. It’s beautiful, fast-growing, productive, easy to grow, cold tolerant, sweet-tasting,slightly pungent, and the seed is not expensive, what more need I say?
Ruby Streaks is so much more colorful and interesting than actual purple mizuna. For the botanists of Asian Greens among us, Ruby Streaks is a Brassica juncea, not B. rapa var japonica, like actual mizuna.
It can be grown and used as a microgreen (cut at small seedling stage), or a baby green after 21 days, and full size after 40 days. You could lightly braise it if you wanted it cooked. The leaves are finely serrated at the baby size and very similar to mizuna at full size. The stems are green and the leaf color ranges from dark green with red veins in warmer weather, to dark maroon in winter. Right now the color is incredible.
We harvest full size leaves by “crew-cutting” one side of each plant with scissors, then chopping them into short lengths. The plants regrow quickly.
It germinates quickly. Fedco warns that it bolts more readily than mizuna. We only grow it in the winter, when nothing is inclined to bolt, so this hasn’t been an issue for us. If you want to sow for spring, I’d recommend starting early in flats or pots indoors, and then transplanting at 4-5 weeks of age, about a month before the last frost date. Use rowcover for a few weeks.
To start in summer for a fall outdoor crops, you could again use flats, or you can make an outdoor nursery seed bed, protected with hoops and rowcover or ProtekNet insect netting from Fedco or from Purple Mountain Organics in Maryland. In hot weather it’s easier to keep outdoor beds damp compared to flats with a small amount of soil in them. We start ours 6/26 – the same dates we use for sowing fall broccoli and cabbage. The last sowing date is about 3 months before the first frost date. Transplant at 3-4 weeks of age, preferably not older. We haven’t tested out the cold-hardiness of Ruby Streaks, but I would expect it to survive at least down to 25F (-4C), the temperature mizuna is good to.
But the hoophouse in winter is where Ruby Streaks really shines! Double layers of inflated plastic provide enough protection in our climate for Ruby Streaks to grow all winter. And I do mean make actual growth, not just rest up waiting for spring! For winter salad mixes, we sow on 9/24 in an outdoor nursery bed, then plant into the hoophouse 10/24 (4 weeks old). We harvest that 11/1-1/25, by only cutting down one side of the plant at a time. After we clear that crop, we sow radishes in the space. We sow a second round of Ruby Streaks and mizuna inside the hoophouse 11/9, thin it into the salad, and then harvest from it 1/27-3/6.
There are relatives of Ruby Streaks, such as Scarlet Frills, Golden Frills, Red Splendor (Johnny’s) and Red Rain,and the beautiful Wild Garden Pungent Mix