When to plant Radishes in New Hampshire
In spring, from Mar 20 – May 10 in Dover to Apr 1 – June 1 in Lebanon.
In fall, from July 1 – Sept 1 in Claremont to Aug 1 – Oct 1 in Laconia.
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 – June 1 | July 1 – Sept 1 |
| Concord | Apr 1 – June 1 | July 1 – Sept 1 |
| Dover | Mar 20 – May 10 | July 15 – Sept 15 |
| Keene | Apr 1 – June 1 | July 1 – Sept 1 |
| Laconia | Mar 20 – May 10 | Aug 1 – Oct 1 |
| Lebanon | Apr 1 – June 1 | July 15 – Sept 15 |
| Manchester | Mar 20 – May 10 | July 15 – Sept 15 |
| Nashua | Mar 20 – May 10 | July 15 – Sept 15 |
| Portsmouth | Mar 20 – May 10 | July 15 – Sept 15 |
| Rochester | Mar 20 – May 10 | July 15 – Sept 15 |
| Somersworth | Mar 20 – May 10 | July 15 – Sept 15 |
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 radishes.