When to plant sweet potato 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

JANFEBMARAPRMAYJUN

Transplant Feb 5 · First harvest May 6 · Wrap by May 27

Last spring frostJan 15

Transplant outFeb 5

First harvestMay 6

Last harvestMay 27

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. Sweet Potato is frost-sensitive, so the 3w after frost timing builds in a safety margin against a late cold snap — setting plants out too early risks losing them to frost.

Common questions

How long does sweet potato take to grow in zone 10b?

Sweet Potato matures in about 90–120 days from transplanting. In zone 10b that means setting plants out around Feb 5 and first picking around May 6.

Will sweet potato survive frost in zone 10b?

No — sweet potato is frost-sensitive. In zone 10b, wait until after the last frost (around Jan 15) to plant, and harvest before the first fall frost (around Dec 31).

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