When to plant Rhubarb in New Hampshire
In spring, from Mar 20 – Apr 15 in Dover to Apr 1 – May 1 in Lebanon.
In fall, from Oct 1 – Nov 1 in Claremont to Oct 15 – Nov 15 in Somersworth.
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 |
|---|---|---|
| Claremont | Apr 1 – May 1 | Oct 1 – Nov 1Now |
| Concord | Apr 1 – May 1 | Oct 1 – Nov 1Now |
| Dover | Mar 20 – Apr 15 | Oct 15 – Nov 15Now |
| Keene | Apr 1 – May 1 | Oct 1 – Nov 1Now |
| Laconia | Mar 20 – Apr 15 | Oct 15 – Dec 1Now |
| Lebanon | Apr 1 – May 1 | Oct 15 – Nov 15Now |
| Manchester | Mar 20 – Apr 15 | Oct 15 – Nov 15Now |
| Nashua | Mar 20 – Apr 15 | Oct 15 – Nov 15Now |
| Portsmouth | Mar 20 – Apr 15 | Oct 15 – Nov 15Now |
| Rochester | Mar 20 – Apr 15 | Oct 15 – Nov 15Now |
| Somersworth | 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.