DibbleWhen to plant fennel in Zone 9
In Zone 9, the last spring frost usually passes around March 1 and the first fall frost arrives around December 1, leaving about 275 frost-free days. The windows below are computed from those frost dates, with the same math the Dibble app uses.
Very long season. Plant cool crops in fall and winter; manage summer heat.
Planting windows for fennel in Zone 9
| Task | Window |
|---|---|
| Direct sow | Feb 15 to Mar 1 |
| Estimated harvest | May 6 to May 27 |
The harvest estimate counts 80 days to maturity, then a picking window of about 21 days. These windows use typical frost dates for Zone 9; Dibble pins them to your exact ZIP code.
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How to grow fennel
Sow bulb fennel a couple of weeks before last frost. Keep it cool and moist, and mound soil around the swelling bulb to blanch it.
Fennel in nearby zones
Keep exploring
Fennel: the full growing guide · The Zone 9 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.