Bok Choy in Zone 10a & 10b
Brassica rapa subsp. chinensis
When to plant bok choy in zone 10b
Zones 10a and 10b share the same average frost dates in our data, so this page covers both.
Method: Either: Start indoors for an earlier harvest, or direct-sow outside for less fuss. Bok Choy tolerates either.
| Start indoors | Dec 26–Jan 2 '27 |
|---|---|
| Direct sow / transplant outside | Jan 30–Feb 6 |
| Estimated harvest | Mar 21–Mar 28 (~50 days after planting) |
Spacing: 1 per square foot (square-foot-gardening spacing). Mature height: 1 ft.
Bok choy is one of the fastest vegetables you can put in the ground, ready in under two months, and its crunchy white stalks and tender leaves work in everything from stir-fries to soups. It's also one of the quickest to ruin if you plant it at the wrong time of year.
How bok choy fits zone 10's season
Zone 10b's frost-free window runs about 324 days, from January 30 to December 20. Bok Choy needs about 50 days from sowing to first harvest.
Good companions
Where to buy bok choy seeds
See why we recommend these suppliers →
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See it growing
Search YouTube for "growing bok choy" videos → (a live search, not a hand-picked video; results vary and aren't vetted by us)
← Back to the full zone 10b calendar · Full companion planting guide · Full plant profile · Plan your beds in the Garden Designer →
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Growing Bok Choy in USDA zone 10b: when to start seeds indoors, when to direct-sow, and when to expect a harvest.
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