When to plant Rhubarb in Maine
In spring, from Mar 10 – Apr 10 in Auburn to Apr 15 – May 10 in Sanford.
In fall, from Oct 1 – Nov 1 in Bangor to Oct 15 – Nov 15 in Westbrook.
Dates are for setting out plants. USDA's earliest safe spring and latest safe fall planting dates, matched to each place's average frost dates.
| Place | Spring | Fall |
|---|---|---|
| Auburn | Mar 10 – Apr 10 | Oct 15 – Dec 1Now |
| Augusta | Mar 20 – Apr 15 | Oct 15 – Dec 1Now |
| Bangor | Mar 20 – Apr 15 | Oct 1 – Nov 1Now |
| Biddeford | Apr 1 – May 1 | Oct 1 – Nov 1Now |
| Lewiston | Mar 10 – Apr 10 | Oct 15 – Dec 1Now |
| Portland | Mar 20 – Apr 15 | Oct 15 – Nov 15Now |
| Saco | Mar 20 – Apr 15 | Oct 15 – Nov 15Now |
| Sanford | Apr 15 – May 10 | Oct 1 – Nov 1Now |
| South Portland | Mar 20 – Apr 15 | Oct 15 – Nov 15Now |
| Waterville | Mar 20 – Apr 15 | Oct 15 – Nov 15Now |
| Westbrook | Mar 20 – Apr 15 | Oct 15 – Nov 15Now |
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 rhubarb.