When to plant Summer squash (zucchini) in Maryland
In spring, from Apr 1 – May 15 in Baltimore to May 1 – June 15 in Westminster.
In fall, June 1 – Aug 1.
USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.
| Place | Spring | Fall |
|---|---|---|
| Aberdeen | Apr 20 – June 1 | June 1 – Aug 1 |
| Annapolis | Apr 10 – June 1 | June 1 – Aug 10 |
| Baltimore | Apr 1 – May 15 | June 1 – Aug 20 |
| Bel Air | Apr 20 – June 1 | June 1 – Aug 1 |
| Bowie | May 1 – June 15 | June 1 – July 20 |
| Cambridge | Apr 10 – June 1 | June 1 – Aug 10 |
| College Park | Apr 20 – June 1 | June 1 – Aug 1 |
| Cumberland | Apr 20 – June 1 | June 1 – July 20 |
| Easton | Apr 10 – June 1 | June 1 – Aug 10 |
| Elkton | Apr 20 – June 1 | June 1 – Aug 1 |
| Frederick | Apr 10 – June 1 | June 1 – Aug 10 |
| Gaithersburg | Apr 10 – June 1 | June 1 – Aug 10 |
| Greenbelt | Apr 20 – June 1 | June 1 – Aug 1 |
| Hagerstown | Apr 20 – June 1 | June 1 – Aug 1 |
| Havre de Grace | Apr 20 – June 1 | June 1 – Aug 1 |
| Hyattsville | Apr 10 – June 1 | June 1 – Aug 10 |
| La Plata | May 1 – June 15 | June 1 – Aug 1 |
| Laurel | Apr 20 – June 1 | June 1 – Aug 10 |
| New Carrollton | May 1 – June 15 | June 1 – July 20 |
| Rockville | Apr 10 – June 1 | June 1 – Aug 10 |
| Salisbury | Apr 10 – June 1 | June 1 – Aug 10 |
| Takoma Park | Apr 10 – June 1 | June 1 – Aug 10 |
| Westminster | May 1 – June 15 | June 1 – July 20 |
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.