Watermelon plant

When to plant watermelons 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 watermelons.

Sow in the bedMay 29
Start pickingAug 22

Your watermelon calendar for zone 3b

Choose a small "icebox" kind for raised beds. Needs a long, hot summer.

Spacing in a raised bed: 1 plant per 2 × 2 ft.

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.

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Watermelons in other zones

See everything to plant in zone 3b →