When to Plant Watermelon in Louisiana
Plant watermelon from mid-March through June in north Louisiana and from March through about July 5 in south Louisiana, following local frost risk.
Published · Reviewed by ThriveThyme
watermelon Louisiana state planting
When to Plant Watermelon in Louisiana
Plant watermelon in Louisiana after frost risk has passed and soil is at least 65 degrees F. Louisiana is not one single planting zone. Southern and Gulf Coast areas warm earlier, while northern parishes can run a few weeks cooler in spring. In many Louisiana gardens, March to April is the main planting window.
LSU's home-garden guide lists March through about July 5 for setting transplants in south Louisiana and mid-March through June in north Louisiana. Earlier spring planting still depends on frost danger passing and settled warm weather. Use the watermelon by zone guide with your local frost date for added context.
Louisiana Timing Notes
- Plant seeds straight in the garden once soil is warm, or transplant carefully if you want an early start.
- Give vines full sun and steady moisture while fruit is growing.
- In very hot areas, avoid planting so late that flowering happens during the worst heat.
- Late plantings face more heat, disease, and insect pressure and must still fit LSU's regional window.
Is It Too Late to Plant Watermelon in Louisiana?
In north Louisiana, LSU's listed transplant window ends in June. In south Louisiana it extends to about July 5. After those dates, save the seed for the next recommended window unless your parish Extension office gives a later local schedule.
When to Harvest Watermelon in Louisiana
Vines planted in March and April often ripen in summer. Pick when several maturity signs agree, especially a creamy-yellow ground spot and a dry nearest tendril. Maintain even soil moisture and avoid heavy irrigation swings near maturity. When to harvest watermelon.
Next Steps
Check your parish forecast, not only the state average. If nights are still cool, wait. Watermelon grows faster from a warm start than from cold, stalled seedlings.