DibbleWhen to plant zucchini 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 zucchini in Zone 3
| Task | Window |
|---|---|
| Direct sow | May 22 to Jun 5 |
| Estimated harvest | Jul 16 to Aug 27 |
The harvest estimate counts 55 days to maturity, then a picking window of about 42 days. These windows use typical frost dates for Zone 3; Dibble pins them to your exact ZIP code.
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How to grow zucchini
Sow summer squash a week after last frost. One or two plants feed a family, pick young and often.
Companion plants
Good neighbors for Zucchini:
Better kept apart:
Zucchini in nearby zones
Keep exploring
Zucchini: the full growing guide · The Zone 3 planting calendar · Every crop and zone
Plant at the right time this season
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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.