When to plant radish in zone 9b — planting calendar

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Showing USDA Zone 9B

Growing SeasonZone 9b

Last frost ~Feb 15First frost ~Dec 10Today

Start indoorsTransplant / sowHarvestFrost risk

JANFEBMAR

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

Last spring frostFeb 15

Direct sowJan 18

First harvestFeb 9

Last harvestFeb 23

Fall succession sowOct 29

First fall frostDec 10

Why these dates work in zone 9b

Zone 9b's last spring frost averages Feb 15 and first fall frost Dec 10 — about 298 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 Oct 29 for a second harvest before frost.

Common questions

How long does radish take to grow in zone 9b?

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

Will radish survive frost in zone 9b?

Yes — radish tolerates light frost. In zone 9b you can sow a little before the last frost (around Feb 15) and keep harvesting past the first fall frost (around Dec 10).

Can I plant a second crop of radish in zone 9b?

Yes — in zone 9b there's time for a fall sowing around Oct 29 for a second harvest before frost.

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