When to plant Summer squash (zucchini) in South Dakota
In spring, from May 1 – 30 in Brandon to May 10 – June 10 in Watertown.
In fall, June 1 – July 1.
USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.
| Place | Spring | Fall |
|---|---|---|
| Aberdeen | May 10 – June 10 | June 1 – July 1 |
| Box Elder | May 10 – June 10 | June 1 – July 1 |
| Brandon | May 1 – 30 | June 1 – July 15 |
| Brookings | May 10 – June 10 | June 1 – July 1 |
| Harrisburg | May 1 – 30 | June 1 – July 1 |
| Huron | May 10 – June 10 | June 1 – July 1 |
| Mitchell | May 1 – 30 | June 1 – July 15 |
| Pierre | May 10 – June 10 | June 1 – July 1 |
| Rapid City | May 1 – 30 | June 1 – July 15 |
| Sioux Falls | May 1 – 30 | June 1 – July 15 |
| Spearfish | May 10 – June 10 | June 1 – July 1 |
| Vermillion | May 1 – 30 | June 1 – July 1 |
| Watertown | May 10 – June 10 | June 1 – July 1 |
| Yankton | May 1 – 30 | June 1 – July 15 |
Planting dates: USDA Home and Garden Bulletin No. 9 (1967), tables 4 and 5. Frost dates: NOAA U.S. Climate Normals 1991–2020. The full USDA table for summer squash.