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Can You Grow Watermelon in North Dakota?

US · USDA Zone 4a · zones 3a, 3b, 4a, 4b

Won't grow here

Watermelons need a long warm season (70-90 days above 25°C) that this zone cannot reliably provide.

Plant zones

4b–11b

North Dakota last frost

late April

North Dakota first frost

early October

Days to harvest

70–90 days

When to plant Watermelons in North Dakota

Start indoors

Mar 28

Transplant

Apr 25

Harvest

Jul 4 – Jul 24

Dates are approximate, based on North Dakota's average frost dates. Your exact yard may vary by microclimate.

About Watermelon

Watermelons love heat space and sun — they are a rewarding crop but need a long warm season.

Start indoors 4 weeks before last frost. Transplant carefully — watermelons hate root disturbance. Give them maximum space. Use black plastic mulch to warm soil. Choose icebox varieties for containers.

Full watermelon growing guide →

Gardening in North Dakota

North Dakota has a harsh continental climate with cold winters and short warm summers. Most of the state is Zone 3b-4a. Focus on cold-hardy crops and short-season varieties.

See what grows well in North Dakota →

Frequently asked questions

Can you grow Watermelon in North Dakota?

Watermelons need a long warm season (70-90 days above 25°C) that this zone cannot reliably provide.

What zone is North Dakota?

North Dakota spans USDA Zone 4a (3a, 3b, 4a, 4b).

When do you plant Watermelons in North Dakota?

Plant Watermelons around late April (start indoors Mar 28), harvest Jul 4 – Jul 24.