Radish plant

When to plant radishes in zone 4b

In zone 4b, the last spring frost usually comes around May 8 and the first fall frost around Sep 28. Here is when to plant radishes.

Sow in the bedApr 3
Start pickingMay 1
Plant again for fallAug 17

Your radish calendar for zone 4b

Ready in about four weeks. Great for kids and impatient gardeners.

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

These dates are estimates from the average frost dates for zone 4b. 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.

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Radishes in other zones

See everything to plant in zone 4b →