DibbleWhen to plant fennel in Zone 6
In Zone 6, the last spring frost usually passes around April 21 and the first fall frost arrives around October 17, leaving about 179 frost-free days. The windows below are computed from those frost dates, with the same math the Dibble app uses.
Generous season. Spring and fall plantings both productive.
Planting windows for fennel in Zone 6
| Task | Window |
|---|---|
| Direct sow | Apr 7 to Apr 21 |
| Estimated harvest | Jun 26 to Jul 17 |
The harvest estimate counts 80 days to maturity, then a picking window of about 21 days. These windows use typical frost dates for Zone 6; 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 6 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.