When to plant bok choy in zone 9a — planting calendar

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Showing USDA Zone 9A

Growing SeasonZone 9a

Last frost ~Feb 28First frost ~Nov 30Today

Start indoorsTransplant / sowHarvestFrost risk

JANFEBMARAPR

Start indoors Jan 31 · Transplant Feb 7 · First harvest Mar 24 · Wrap by Apr 14

Last spring frostFeb 28

Start seeds indoorsJan 31

Transplant outFeb 7

First harvestMar 24

Last harvestApr 14

Fall succession sowOct 5

First fall frostNov 30

Why these dates work in zone 9a

Zone 9a's last spring frost averages Feb 28 and first fall frost Nov 30 — about 275 frost-free days. Bok Choy tolerates light frost, so you can set plants out ahead of the last-frost date and keep harvesting into the cooler fall. Starting seeds indoors 4 weeks ahead gives strong transplants ready the moment the soil warms. There's also room for a fall succession sowing around Oct 5 for a second harvest before frost.

Common questions

How long does bok choy take to grow in zone 9a?

Bok Choy matures in about 45–60 days from transplanting. In zone 9a that means setting plants out around Feb 7 and first picking around Mar 24.

Will bok choy survive frost in zone 9a?

Yes — bok choy tolerates light frost. In zone 9a you can set plants out a little before the last frost (around Feb 28) and keep harvesting past the first fall frost (around Nov 30).

Can I plant a second crop of bok choy in zone 9a?

Yes — in zone 9a there's time for a fall sowing around Oct 5 for a second harvest before frost.

For soil, spacing, pests and companion planting, see the full bok choy growing guide →