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When to plant onions in zone 5
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Onions in USDA zone 5
| Step | Dates |
|---|---|
| Start seeds indoors | Feb 19 – Mar 5 |
| Transplant outdoors | Apr 2 – Apr 23 |
| Expected first harvest | from Jul 11 |
Average zone 5 frost dates: last spring frost ≈ Apr 30, first fall frost ≈ Oct 10 (163 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 5?
Start seeds indoors: Feb 19 – Mar 5; Transplant outdoors: Apr 2 – Apr 23; Expected first harvest: from Jul 11.
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