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Can You Grow Watermelon in New Hampshire?

US · USDA Zone 5b · zones 4a, 4b, 5a, 5b, 6a

Grows well here

Watermelons thrive here — they love the long warm season your zone provides.

Plant zones

4b–11b

New Hampshire last frost

early April

New Hampshire first frost

late October

Days to harvest

70–90 days

When to plant Watermelons in New Hampshire

Start indoors

Mar 10

Transplant

Apr 7

Harvest

Jun 16 – Jul 6

Dates are approximate, based on New Hampshire'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 New Hampshire

New Hampshire has a humid continental climate. Coastal areas are Zone 5b-6a; northern mountains are Zone 4a-5a. Short growing seasons but productive for cool-season crops and berries.

See what grows well in New Hampshire →

Frequently asked questions

Can you grow Watermelon in New Hampshire?

Watermelons thrive here — they love the long warm season your zone provides.

What zone is New Hampshire?

New Hampshire spans USDA Zone 5b (4a, 4b, 5a, 5b, 6a).

When do you plant Watermelons in New Hampshire?

Plant Watermelons around early April (start indoors Mar 10), harvest Jun 16 – Jul 6.