When to plant Watermelon in Wyoming
In spring, from June 1 – 15 in Casper to June 15 – July 1 in Sheridan.
In fall, from May 1 – June 15 in Green River to May 15 – June 1 in Gillette.
USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.
| Place | Spring | Fall |
|---|---|---|
| Casper | June 1 – 15 | May 15 – June 1 |
| Cheyenne | June 1 – 15 | May 15 – June 1 |
| Cody | June 1 – 15 | May 15 – June 1 |
| Evanston | Not listed | Not listed |
| Gillette | June 1 – 15 | May 15 – June 1 |
| Green River | June 15 – July 1 | May 1 – June 15 |
| Jackson | Not listed | Not listed |
| Laramie | Not listed | Not listed |
| Riverton | June 1 – 15 | May 1 – June 15 |
| Rock Springs | June 15 – July 1 | May 1 – June 15 |
| Sheridan | June 15 – July 1 | May 1 – June 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.