DibbleWhen to plant marigold 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 marigold in Zone 10
| Task | Window |
|---|---|
| Start seeds indoors | Dec 20 to Jan 3 |
| Transplant | Jan 31 to Feb 14 |
| Estimated harvest | Mar 22 to Jun 20 |
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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How to grow marigold
Start indoors 6 weeks before last frost and transplant around frost date. A classic companion that deters many pests.
Companion plants
Good neighbors for Marigold:
Marigold in nearby zones
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.