DibbleWhen to plant sunflower in Zone 11
In Zone 11, the last spring frost usually passes around January 1 and the first fall frost arrives around December 31, leaving about 365 frost-free days. The windows below are computed from those frost dates, with the same math the Dibble app uses.
Frost-free, tropical. Year-round growing; timing follows wet/dry and heat, not frost.
Planting windows for sunflower in Zone 11
| Task | Window |
|---|---|
| Direct sow | Jan 1 to Jan 15 |
| Estimated harvest | Mar 22 to Apr 12 |
The harvest estimate counts 80 days to maturity, then a picking window of about 21 days. These windows use typical frost dates for Zone 11; Dibble pins them to your exact ZIP code.
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How to grow sunflower
Sow sunflowers around your last frost date. Stagger plantings every couple of weeks for blooms all summer.
Companion plants
Good neighbors for Sunflower:
Better kept apart:
Sunflower in nearby zones
Keep exploring
Sunflower: the full growing guide · The Zone 11 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.