DibbleGrowing watermelon: from seed to harvest
Watermelon needs heat and room. Sow once the soil is warm; where the warm season is short, start indoors and choose early varieties.
Planting dates for watermelon by zone
| Zone | Start seeds indoors | Sow or transplant | Harvest |
|---|---|---|---|
| Zone 3 | Not suited | ||
| Zone 4 | not needed | June 13 | September 16 |
| Zone 5 | not needed | May 30 | August 16 |
| Zone 6 | not needed | May 28 | August 19 |
| Zone 7 | not needed | May 15 | August 6 |
| Zone 8 | not needed | April 19 | June 29 |
| Zone 9 | not needed | March 28 | June 13 |
| Zone 10 | not needed | April 22 | May 14 |
| Zone 11 | not needed | January 1 | April 1 |
Each date is the start of the best window from the same climate engine the Dibble app uses, run at typical places in each zone. Dibble tunes them to your garden's own location and lets you adjust frost dates for your own yard.
Companion plants
Good neighbors for Watermelon:
Better kept apart:
Family and rotation
Watermelon is in the cucurbits family. Sprawling heavy feeders. Rotate away from where squash family grew last year. Learn about crop rotation.
Related crops
Cucumber
When to plantZucchini
When to plantWinter Squash
When to plantCantaloupe
When to plantPumpkin
When to plantStrawberry
When to plant
Questions
When should I plant watermelon?
It depends on your zone. Watermelon is a tender crop, so the timing follows your last spring frost. Look up your zone in the table below for exact start, sow, and harvest dates, or open Dibble and set where your garden is to get your own calendar.
How long does it take to grow watermelon?
About 85 days from sowing to the first harvest, with a picking window of roughly 21 days after that.
What grows well with watermelon?
Good companions include Sweet Corn, Nasturtium. Keep it away from Potato.
Plant at the right time this season
Dibble builds your calendar in under a minute. Free to start, no account needed.