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Can You Grow Watermelon in Newfoundland and Labrador?

Canada · Canadian Zone 4 · zones 1, 2, 3, 4, 5

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

Newfoundland and Labrador last frost

early May

Newfoundland and Labrador first frost

early October

Days to harvest

70–90 days

When to plant Watermelons in Newfoundland and Labrador

Start indoors

Apr 3

Transplant

May 1

Harvest

Jul 10 – Jul 30

Dates are approximate, based on Newfoundland and Labrador'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 Newfoundland and Labrador

Newfoundland has a subarctic to cool maritime climate. The island is Zone 4b-5b near the coast; Labrador is Zone 1-3. Short growing seasons but excellent for cold-hardy crops, root vegetables, and berries.