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When to plant onions in zone 3
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Onions in USDA zone 3
| Step | Dates |
|---|---|
| Start seeds indoors | Mar 11 – Mar 25 |
| Transplant outdoors | Apr 22 – May 13 |
| Expected first harvest | from Jul 31 |
Average zone 3 frost dates: last spring frost ≈ May 20, first fall frost ≈ Sep 15 (118 frost-free days). Local dates can vary by 2-3 weeks.
Plant sets or transplants 2-4 weeks before the last frost; pick long-day varieties in the north, short-day in the south.
FAQ
When to plant onions in zone 3?
Start seeds indoors: Mar 11 – Mar 25; Transplant outdoors: Apr 22 – May 13; Expected first harvest: from Jul 31.
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