DibbleWhen to plant cauliflower 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 cauliflower in Zone 6
| Task | Window |
|---|---|
| Start seeds indoors | Mar 10 to Mar 24 |
| Transplant | Apr 7 to Apr 21 |
| Estimated harvest | Jun 16 to Jun 30 |
The harvest estimate counts 70 days to maturity, then a picking window of about 14 days. These windows use typical frost dates for Zone 6; Dibble pins them to your exact ZIP code.
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Cauliflower in a Zone 6 season
Zone 6 gives about 179 frost-free days. Cauliflower needs roughly 70 days from transplant. That leaves about 109 days of slack, so there is room for a late start or a second planting.
How to grow cauliflower
Start seeds indoors about 4 weeks before planting out, timing it so the heads form in cool weather. Steady moisture and cool weather make tight white heads, while heat leaves them loose.
Companion plants
Good neighbors for Cauliflower:
Better kept apart:
Cauliflower in other zones
Not in Zone 6? Pick your zone for the same dated windows.
Keep exploring
Cauliflower: 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.