DibbleWhen to plant spinach 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 spinach in Zone 10
| Task | Window |
|---|---|
| Direct sow | Dec 20 to Jan 3 |
| Estimated harvest | Feb 3 to Feb 24 |
The harvest estimate counts 45 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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Spinach in a Zone 10 season
Zone 10 gives about 318 frost-free days. Spinach needs roughly 45 days from sowing. That leaves about 273 days of slack, so there is room for a late start or a second planting.
Sowing every 14 days, Zone 10 has room for about 20 plantings.
How to grow spinach
Sow spinach 6 weeks before last frost, it thrives in cold soil and bolts in heat. Succession sow for spring and fall harvests.
Companion plants
Good neighbors for Spinach:
Spinach in other zones
Not in Zone 10? Pick your zone for the same dated windows.
Keep exploring
Spinach: 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.