When to plant Green beans in Maine
In spring, from Apr 25 – June 30 in Auburn to May 15 – June 30 in Sanford.
In fall, from June 1 – July 10 in Bangor to July 1 – Aug 1 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 | Apr 25 – June 30 | July 1 – Aug 1 |
| Augusta | May 10 – June 30 | July 1 – Aug 1 |
| Bangor | May 10 – June 30 | June 1 – July 10 |
| Biddeford | May 10 – June 30 | June 1 – July 10 |
| Lewiston | Apr 25 – June 30 | July 1 – Aug 1 |
| Portland | May 10 – June 30 | June 15 – July 20 |
| Saco | May 10 – June 30 | June 15 – July 20 |
| Sanford | May 15 – June 30 | June 1 – July 10 |
| South Portland | May 10 – June 30 | June 15 – July 20 |
| Waterville | May 10 – June 30 | June 15 – July 20 |
| Westbrook | May 10 – June 30 | June 15 – 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 snap beans.