When to plant Swiss chard in Maine
In spring, from Apr 1 – June 15 in Auburn to May 10 – June 15 in Sanford.
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 |
|---|---|---|
| Auburn | Apr 1 – June 15 | June 1 – Aug 1 |
| Augusta | Apr 15 – June 15 | June 1 – Aug 1 |
| Bangor | Apr 15 – June 15 | June 1 – July 5 |
| Biddeford | Apr 20 – June 15 | June 1 – July 5 |
| Lewiston | Apr 1 – June 15 | June 1 – Aug 1 |
| Portland | Apr 15 – June 15 | June 1 – July 20 |
| Saco | Apr 15 – June 15 | June 1 – July 20 |
| Sanford | May 10 – June 15 | June 1 – July 5 |
| South Portland | Apr 15 – June 15 | June 1 – July 20 |
| Waterville | Apr 15 – June 15 | June 1 – July 20 |
| Westbrook | Apr 15 – 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 swiss chard.