DibbleWhen to plant pumpkins in Zone 3
In Zone 3, the last spring frost usually passes around May 15 and the first fall frost arrives around September 15, leaving about 123 frost-free days. The windows below are computed from those frost dates, with the same math the Dibble app uses.
Short, cool season. Start most warm crops indoors and protect from late frosts.
Planting windows for pumpkins in Zone 3
| Task | Window |
|---|---|
| Direct sow | Jun 12 to Jun 26 |
| Estimated harvest | Sep 30 to Oct 21 |
The harvest estimate counts 110 days to maturity, then a picking window of about 21 days. These windows use typical frost dates for Zone 3; Dibble pins them to your exact ZIP code.
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Pumpkin in a Zone 3 season
Zone 3 gives about 123 frost-free days. Pumpkin needs roughly 110 days from sowing. That leaves about 13 days of slack, which is tight. Start indoors where you can and do not sow late.
How to grow pumpkins
Give pumpkins plenty of room. Sow once the soil is warm and nights stay mild, timing it so the fruit ripens in dry weather. Cure the mature fruit in the sun before storing.
Companion plants
Good neighbors for Pumpkin:
Better kept apart:
Pumpkin in other zones
Not in Zone 3? Pick your zone for the same dated windows.
Keep exploring
Pumpkin: the full growing guide · The Zone 3 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.