When to plant potato 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

JANFEBMARAPRMAYJUN

Sow Feb 1 · First harvest Apr 12 · Wrap by May 24

Last spring frostFeb 15

Direct sowFeb 1

First harvestApr 12

Last harvestMay 24

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. Potato tolerates light frost, so you can sow ahead of the last-frost date and keep harvesting into the cooler fall.

Common questions

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

Potato matures in about 70–120 days from sowing. In zone 9b that means sowing around Feb 1 and first picking around Apr 12.

Will potato survive frost in zone 9b?

Yes — potato 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).

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