Watermelon plant

When to plant watermelons 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 watermelons.

Sow in the bedMay 22
Start pickingAug 15

Your watermelon calendar for zone 4b

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 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.

Open the free planner →

Watermelons in other zones

See everything to plant in zone 4b →