When to plant onions in zone 6b
In zone 6b, the last spring frost usually comes around Apr 15 and the first fall frost around Oct 20. Here is when to plant onions.
Sow in the bedMar 18
Start pickingJun 26
Your onion (from sets) calendar for zone 6b
- Mar 18: Plant onion sets in the bed
- Jun 26: 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 6b. 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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