Tatsoi Seeds,
Green

Tatsoi can be planted in early spring or late summer for a fall harvest. Sow seeds about 2-3 weeks before the last expected frost in spring, or during late summer to enjoy a fall crop. This cold-hardy green can be grown in most regions as a spring and fall crop, and overwintered where winters are mild. Check local frost dates to determine the best time for planting.

Direct sow seeds 1/4 inch deep in rows spaced 10 inches apart, with seeds planted 2 inches apart. As seedlings grow, thin them to about 12 inches apart to allow ample space for mature growth. If starting indoors, transplant seedlings outdoors when they have at least two true leaves and the danger of frost has passed.

Tatsoi requires consistent moisture, so water regularly to keep the soil evenly moist but not waterlogged. Fertilize the soil with a balanced organic fertilizer before planting, and consider adding compost to improve soil fertility. Tatsoi can be harvested as individual leaves or as a whole plant, depending on your preference. It’s best to harvest in the morning when the leaves are most hydrated​.

Like bok choy, tatsoi is an annual, completing its life cycle in one year. To avoid selecting bolt-prone plants, don't save seeds from prematurely bolted ones. Let plants mature fully, harvest the dried pods, crumble the small round seeds into a jar or bag, then seal and store the seeds in a cool, dark, dry place. Bok choy and tatsoi cross-pollinate with other rapa species but not with different species of Brassica, so it's safe to grow them next to mustard greens (Brassica juncea), for example. To ensure seed purity, isolate your bok choy from other blooming B. rapa by about a half mile or use caging techniques. Allow your healthiest plants to flower for a strong, diverse seed pool.