DibbleWhen to plant cucumbers 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 cucumbers in Zone 3
| Task | Window |
|---|---|
| Direct sow | May 29 to Jun 12 |
| Estimated harvest | Jul 28 to Sep 1 |
The harvest estimate counts 60 days to maturity, then a picking window of about 35 days. These windows use typical frost dates for Zone 3; Dibble pins them to your exact ZIP code.
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Cucumber in a Zone 3 season
Zone 3 gives about 123 frost-free days. Cucumber needs roughly 60 days from sowing. That leaves about 63 days of slack, so there is room for a late start or a second planting.
Sowing every 21 days, Zone 3 has room for about 4 plantings.
How to grow cucumbers
Sow cucumbers 2 weeks after last frost in warm soil. Trellising saves space and keeps fruit clean.
Companion plants
Good neighbors for Cucumber:
Better kept apart:
Cucumber in other zones
Not in Zone 3? Pick your zone for the same dated windows.
Keep exploring
Cucumber: 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.