🍉 When to Plant Watermelon

When should I plant watermelon?

Plant watermelon outdoors 2 weeks after last frost. For a head start, start seeds indoors 4 weeks before your area's last frost date.

Is watermelon frost sensitive?

Yes — Watermelon is frost-sensitive and will be damaged or killed by temperatures at or below 32°F. Wait until all frost danger has passed and nighttime lows are consistently above 60°F.

What temperature does watermelon need?

Watermelon grows best between 70°F and 95°F. It can survive down to 60°F, but growth slows significantly below 70°F. Warm nights are especially important once fruiting begins.

How long does watermelon take to grow?

Watermelon typically takes 70–90 days from transplant (or direct sow) to first harvest.

Should I start watermelon seeds indoors?

Yes — start watermelon seeds indoors 4 weeks before your area's last expected frost date. This gives seedlings time to develop strong roots before outdoor conditions are ready.

Is it too cold to plant watermelon?

It is too cold to plant Watermelon outdoors when nighttime temperatures are falling below 60°F. Watermelon is frost-sensitive, so a single freeze will kill it — wait until your area's last frost date has passed and nights are reliably above 60°F. Use CanIPlant to check your local 7-day forecast and get a real-time answer for your ZIP code.

Is it too hot to plant watermelon?

Watermelon starts to struggle when temperatures climb above 95°F. As a warm-season crop, Watermelon enjoys heat but can experience blossom drop and reduced fruiting above 100°F. Consistent highs above that level may delay planting until temperatures moderate. CanIPlant checks your local forecast highs to flag this automatically.

Any tips for growing watermelon?

Needs very warm conditions.