DibbleWhen to plant watermelon 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 watermelon in Zone 10
| Task | Window |
|---|---|
| Direct sow | Feb 14 to Feb 28 |
| Estimated harvest | May 10 to May 31 |
The harvest estimate counts 85 days to maturity, then a picking window of about 21 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 watermelon
Watermelon needs heat and room. Sow 2 weeks after last frost; in short seasons start indoors and pick early varieties.
Companion plants
Good neighbors for Watermelon:
Better kept apart:
Watermelon in nearby zones
Keep exploring
Watermelon: 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.