When to plant Watermelon in South Dakota
In spring, from May 15 – June 15 in Brandon to June 1 – 15 in Watertown.
In fall, from May 15 – June 1 in Aberdeen to June 1 – 15 in Yankton.
USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.
| Place | Spring | Fall |
|---|---|---|
| Aberdeen | June 1 – 15 | May 15 – June 1 |
| Box Elder | June 1 – 15 | May 15 – June 1 |
| Brandon | May 15 – June 15 | June 1 – 15 |
| Brookings | June 1 – 15 | May 15 – June 1 |
| Harrisburg | May 15 – June 15 | May 15 – June 1 |
| Huron | June 1 – 15 | May 15 – June 1 |
| Mitchell | May 15 – June 15 | June 1 – 15 |
| Pierre | June 1 – 15 | May 15 – June 1 |
| Rapid City | May 15 – June 15 | June 1 – 15 |
| Sioux Falls | May 15 – June 15 | June 1 – 15 |
| Spearfish | June 1 – 15 | May 15 – June 1 |
| Vermillion | May 15 – June 15 | May 15 – June 1 |
| Watertown | June 1 – 15 | May 15 – June 1 |
| Yankton | May 15 – June 15 | June 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.