Planting Date · Watermelon
Watermelon Planting Date Calculator
Calculate the optimal planting dates for watermelon based on your USDA zone, last frost date, and preferred start method.
Optimal Soil Temp
70°F
Days to Maturity
85 days
Frost Tolerance
very tender
Planting Depth
1 inch
Input
Fill in the fields below, then click Calculate.
Select your USDA plant hardiness zone (3–10).
Approximate month of your last spring frost.
How you plan to start the crop.
No results yet
Fill in the fields and click Calculate to see results.
Tips & Best Practices
- Watermelons need a long, hot growing season — start indoors in short-season zones.
- Wait until soil is at least 70°F before transplanting or direct sowing.
- Use black plastic mulch to warm soil and conserve moisture.
- Reduce watering in the last week before harvest for sweeter fruit.