When to plant radish 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

DECJANFEB

Sow Dec 18 · First harvest Jan 9 · Wrap by Jan 23

Last spring frostJan 15

Direct sowDec 18

First harvestJan 9

Last harvestJan 23

Fall succession sowNov 19

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. Radish tolerates light frost, so you can sow ahead of the last-frost date and keep harvesting into the cooler fall. There's also room for a fall succession sowing around Nov 19 for a second harvest before frost.

Common questions

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

Radish matures in about 22–30 days from sowing. In zone 10b that means sowing around Dec 18 and first picking around Jan 9.

Will radish survive frost in zone 10b?

Yes — radish 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 radish in zone 10b?

Yes — in zone 10b there's time for a fall sowing around Nov 19 for a second harvest before frost.

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