DibbleWhen to plant lettuce 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 lettuce in Zone 10
| Task | Window |
|---|---|
| Direct sow | Jan 3 to Jan 17 |
| Estimated harvest | Feb 22 to Mar 15 |
The harvest estimate counts 50 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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Lettuce in a Zone 10 season
Zone 10 gives about 318 frost-free days. Lettuce needs roughly 50 days from sowing. That leaves about 268 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 lettuce
Sow lettuce 4 weeks before last frost and again every 2 weeks for a steady supply. It bolts in heat, so favor spring and fall.
Companion plants
Good neighbors for Lettuce:
Lettuce in other zones
Not in Zone 10? Pick your zone for the same dated windows.
Keep exploring
Lettuce: 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.