When to plant collards in zone 10b — planting calendar

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Showing USDA Zone 10B

Growing SeasonZone 10b

Last frost ~Jan 15First frost ~Dec 31Today

Start indoorsTransplant / sowHarvestFrost risk

DECJANFEBMARAPRMAYJUN

Start indoors Dec 11 · Sow Dec 25 · First harvest Feb 23 · Wrap by Jun 1

Last spring frostJan 15

Start seeds indoorsDec 11

Direct sowDec 25

First harvestFeb 23

Last harvestJun 1

Fall succession sowOct 22

First fall frostDec 31

Why these dates work in zone 10b

Zone 10b's last spring frost averages Jan 15 and first fall frost Dec 31 — about 350 frost-free days. Collards tolerates light frost, so you can sow ahead of the last-frost date and keep harvesting into the cooler fall. Starting seeds indoors 5 weeks ahead gives strong transplants ready the moment the soil warms. There's also room for a fall succession sowing around Oct 22 for a second harvest before frost.

Common questions

How long does collards take to grow in zone 10b?

Collards matures in about 60–85 days from sowing. In zone 10b that means sowing around Dec 25 and first picking around Feb 23.

Will collards survive frost in zone 10b?

Yes — collards tolerates light frost. In zone 10b you can sow a little before the last frost (around Jan 15) and keep harvesting past the first fall frost (around Dec 31).

Can I plant a second crop of collards in zone 10b?

Yes — in zone 10b there's time for a fall sowing around Oct 22 for a second harvest before frost.

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