Green onion plant

When to plant green onions in zone 3b

In zone 3b, the last spring frost usually comes around May 15 and the first fall frost around Sep 15. Here is when to plant green onions.

Sow in the bedApr 17
Start pickingJun 16
Plant again for fallJul 3

Your green onion calendar for zone 3b

Snip what you need; they regrow from the roots.

Spacing in a raised bed: 16 plants per square foot.

These dates are estimates from the average frost dates for zone 3b. Your local frost dates may be a week or two different. If a late cold snap is forecast, wait a few days.

Plan your raised bed in 3D. Pick your bed size and material, choose your plants, and get a printable plan with measurements, a shopping list and planting dates for your ZIP code. Free, no sign-up.

Open the free planner →

Green onions in other zones

See everything to plant in zone 3b →