When to plant onions in zone 3a
In zone 3a, the last spring frost usually comes around May 20 and the first fall frost around Sep 10. Here is when to plant onions.
Sow in the bedApr 22
Start pickingJul 31
Your onion (from sets) calendar for zone 3a
- Apr 22: Plant onion sets in the bed
- Jul 31: Start picking onions
Plant small bulbs ("sets") pointy end up. Harvest when the tops fall over.
Spacing in a raised bed: 9 plants per square foot.
These dates are estimates from the average frost dates for zone 3a. Your local frost dates may be a week or two different. If a late cold snap is forecast, wait a few days.
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