Potato in Zone 10a & 10b
Solanum tuberosum
When to plant potato in zone 10b
Zones 10a and 10b share the same average frost dates in our data, so this page covers both.
Method: Start indoors: Start indoors from seed, then transplant outside. In your zone, Potato needs a head start on the heat that direct-sowing elsewhere doesn't require.
| Window | Fall window |
|---|---|
| Start indoors | Aug–Dec |
| Direct sow / transplant outside | Sep–Jan |
| Estimated harvest | Nov 30–May 1 '27 (~90 days after transplanting) |
Spacing: 1 per square foot (square-foot-gardening spacing). Mature height: 1.5-2 ft.
Zone 10b dates sourced from growinginthegarden.com.
Potatoes aren't grown from true seed in the home garden. They're grown from seed potatoes, small tubers (or cut pieces of larger ones) planted directly in a furrow, each one sending up a plant that produces a new cluster of tubers underground.
How potato fits zone 10's season
Zone 10b's frost-free window runs about 324 days, from January 30 to December 20. Potato needs about 90 days from sowing to first harvest.
Good companions
- Bush Beans: Beans fix nitrogen that heavy-feeding potatoes use.
Where to buy potato seeds
See why we recommend these suppliers →
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See it growing
Search YouTube for "growing potato" videos → (a live search, not a hand-picked video; results vary and aren't vetted by us)
← Back to the full zone 10b calendar · Full companion planting guide · Full plant profile · Plan your beds in the Garden Designer →
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Growing Potato in USDA zone 10b: when to start seeds indoors, when to direct-sow, and when to expect a harvest.
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