When to plant spinach 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

JANFEBMARAPR

Sow Jan 18 · First harvest Feb 24 · Wrap by Mar 24

Last spring frostFeb 15

Direct sowJan 18

First harvestFeb 24

Last harvestMar 24

Fall succession sowOct 15

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. Spinach 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 15 for a second harvest before frost.

Common questions

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

Spinach matures in about 37–50 days from sowing. In zone 9b that means sowing around Jan 18 and first picking around Feb 24.

Will spinach survive frost in zone 9b?

Yes — spinach 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 spinach in zone 9b?

Yes — in zone 9b there's time for a fall sowing around Oct 15 for a second harvest before frost.

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