Tatsoi in Zone 5a & 5b
Brassica rapa var. rosularis
When to plant tatsoi in zone 5b
Zones 5a and 5b share the same average frost dates in our data, so this page covers both.
Method: Direct sow: Direct-sow outside. Tatsoi doesn't transplant well, or doesn't need the extra time indoors.
| Start indoors | Not typically started indoors |
|---|---|
| Direct sow / transplant outside | Apr 19–Apr 26 |
| Estimated harvest | Jun 3–Jun 10 (~45 days after direct-sowing) |
Spacing: 9 per square foot (square-foot-gardening spacing). Mature height: 4-8 in.
Tatsoi is a close relative of bok choy, grown for its low, spoon-shaped rosette of dark green leaves. It's one of the more cold-hardy Asian greens, making it a reliable choice for a late-fall harvest.
How tatsoi fits zone 5's season
Zone 5b's frost-free window runs about 148 days, from May 10 to October 5. Tatsoi needs about 45 days from sowing to first harvest.
Good companions
No standout companions recorded yet for Tatsoi.
Where to buy tatsoi seeds
See why we recommend these suppliers →
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See it growing
Search YouTube for "growing tatsoi" videos → (a live search, not a hand-picked video; results vary and aren't vetted by us)
← Back to the full zone 5b calendar · Full companion planting guide · Full plant profile · Plan your beds in the Garden Designer →
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Growing Tatsoi in USDA zone 5b: when to start seeds indoors, when to direct-sow, and when to expect a harvest.
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