When to plant Watermelon in Delaware
In spring, from Apr 10 – May 15 in Dover to Apr 20 – June 1 in Wilmington.
In fall, July 1 – 15.
USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.
| Place | Spring | Fall |
|---|---|---|
| Dover | Apr 10 – May 15 | July 1 – 15 |
| Middletown | Apr 20 – June 1 | July 1 – 15 |
| Milford | Apr 20 – June 1 | July 1 – 15 |
| Newark | Apr 20 – June 1 | July 1 – 15 |
| Smyrna | Apr 10 – May 15 | July 1 – 15 |
| Wilmington | Apr 20 – June 1 | July 1 – 15 |
Planting dates: USDA Home and Garden Bulletin No. 9 (1967), tables 4 and 5. Frost dates: NOAA U.S. Climate Normals 1991–2020. “—” means the place's frost date is outside the table. The full USDA table for watermelon.