When to plant Spinach in Maine
In spring, from Mar 1 – Apr 15 in Auburn to Apr 10 – June 15 in Sanford.
In fall, from July 1 – Aug 15 in Bangor to Aug 20 – Sept 10 in Lewiston.
USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.
| Place | Spring | Fall |
|---|---|---|
| Auburn | Mar 1 – Apr 15 | Aug 20 – Sept 10 |
| Augusta | Mar 20 – Apr 20 | Aug 20 – Sept 10 |
| Bangor | Mar 20 – Apr 20 | July 1 – Aug 15 |
| Biddeford | Apr 1 – June 15 | July 1 – Aug 15 |
| Lewiston | Mar 1 – Apr 15 | Aug 20 – Sept 10 |
| Portland | Mar 20 – Apr 20 | Aug 1 – Sept 1 |
| Saco | Mar 20 – Apr 20 | Aug 1 – Sept 1 |
| Sanford | Apr 10 – June 15 | July 1 – Aug 15 |
| South Portland | Mar 20 – Apr 20 | Aug 1 – Sept 1 |
| Waterville | Mar 20 – Apr 20 | Aug 1 – Sept 1 |
| Westbrook | Mar 20 – Apr 20 | Aug 1 – Sept 1 |
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 spinach.