DibbleWhen to plant sweet corn in Zone 10
In Zone 10, the last spring frost usually passes around January 31 and the first fall frost arrives around December 15, leaving about 318 frost-free days. The windows below are computed from those frost dates, with the same math the Dibble app uses.
Nearly frost-free. Grow cool crops in winter; summers are too hot for many vegetables.
Planting windows for sweet corn in Zone 10
| Task | Window |
|---|---|
| Direct sow | Feb 7 to Feb 21 |
| Estimated harvest | Apr 23 to May 3 |
The harvest estimate counts 75 days to maturity, then a picking window of about 10 days. These windows use typical frost dates for Zone 10; Dibble pins them to your exact ZIP code.
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How to grow sweet corn
Sow corn a week after last frost in warm soil. Plant in blocks of several short rows, not one long row, for good pollination.
Companion plants
Good neighbors for Sweet Corn:
Better kept apart:
Sweet Corn in nearby zones
Keep exploring
Sweet Corn: the full growing guide · The Zone 10 planting calendar · Every crop and zone
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Dates are estimates based on typical frost dates for the zone. Your yard has its own microclimate, so use them as a starting point and adjust as you learn your space.