DibbleWhen to plant corn in Zone 5
In Zone 5, the last spring frost usually passes around April 30 and the first fall frost arrives around October 1, leaving about 154 frost-free days. The windows below are computed from those frost dates, with the same math the Dibble app uses.
Classic temperate season. Most vegetables and flowers do well with normal timing.
Planting windows for corn in Zone 5
| Task | Window |
|---|---|
| Direct sow | May 7 to May 21 |
| Estimated harvest | Jul 21 to Jul 31 |
The harvest estimate counts 75 days to maturity, then a picking window of about 10 days. These windows use typical frost dates for Zone 5; Dibble pins them to your exact ZIP code.
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Sweet Corn in a Zone 5 season
Zone 5 gives about 154 frost-free days. Sweet Corn needs roughly 75 days from sowing. That leaves about 79 days of slack, so there is room for a late start or a second planting.
How to grow corn
Sow corn a week after last frost in warm soil. Plant in blocks of several short rows, not one long row, for good pollination.
Companion plants
Good neighbors for Sweet Corn:
Better kept apart:
Sweet Corn in other zones
Not in Zone 5? Pick your zone for the same dated windows.
Keep exploring
Sweet Corn: the full growing guide · The Zone 5 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.