DibbleWhen to plant green onion 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 green onion in Zone 3
| Task | Window |
|---|---|
| Direct sow | Apr 17 to May 1 |
| Estimated harvest | Jun 16 to Jul 16 |
The harvest estimate counts 60 days to maturity, then a picking window of about 30 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 green onion
Sow scallions thickly 4 weeks before last frost and harvest young. Quick and hardy, succession sow for a steady supply.
Companion plants
Good neighbors for Green Onion:
Better kept apart:
Green Onion in nearby zones
Keep exploring
Green Onion: 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.