DibbleWhen to plant collard greens 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 collard greens in Zone 10
| Task | Window |
|---|---|
| Start seeds indoors | Dec 20 to Jan 3 |
| Transplant | Jan 17 to Jan 31 |
| Estimated harvest | Mar 18 to Jun 16 |
The harvest estimate counts 60 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 collard greens
Start indoors 6 weeks before last frost and transplant 2 weeks before. Heat- and cold-tolerant, pick the lower leaves for months.
Companion plants
Good neighbors for Collard Greens:
Better kept apart:
Collard Greens in nearby zones
Keep exploring
Collard Greens: 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.