DibbleWhen to plant marigolds 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 marigolds in Zone 10
| Task | Window |
|---|---|
| Start seeds indoors | Jan 3 to Jan 17 |
| Transplant | Feb 14 to Feb 28 |
| Estimated harvest | Apr 5 to Jul 4 |
The harvest estimate counts 50 days to maturity, then a picking window of about 90 days. These windows use typical frost dates for Zone 10; Dibble pins them to your exact ZIP code.
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Marigold in a Zone 10 season
Zone 10 gives about 318 frost-free days. Marigold needs roughly 50 days from transplant. That leaves about 268 days of slack, so there is room for a late start or a second planting.
How to grow marigolds
Start seeds indoors about 6 weeks before planting out, and transplant once nights are no longer cold. A classic companion that deters many pests. Deadhead for steady blooms.
Companion plants
Good neighbors for Marigold:
Marigold in other zones
Not in Zone 10? Pick your zone for the same dated windows.
Keep exploring
Marigold: 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.