When to plant Summer squash (zucchini) in District of Columbia
In spring, Apr 10 – June 1 in Washington.
In fall, June 1 – Aug 10 in Washington.
USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.
| Place | Spring | Fall |
|---|---|---|
| Washington | Apr 10 – June 1 | June 1 – Aug 10 |
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 summer squash.