When to plant Collard greens in New Hampshire
In spring, from Apr 1 – June 1 in Dover to Apr 15 – June 1 in Lebanon.
In fall, from June 15 – July 15 in Claremont to July 15 – Aug 15 in Laconia.
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 15 – June 1 | June 15 – July 15 |
| Concord | Apr 15 – June 1 | June 15 – July 15 |
| Dover | Apr 1 – June 1 | July 1 – Aug 1 |
| Keene | Apr 15 – June 1 | June 15 – July 15 |
| Laconia | Apr 1 – June 1 | July 15 – Aug 15 |
| Lebanon | Apr 15 – June 1 | July 1 – Aug 1 |
| Manchester | Apr 1 – June 1 | July 1 – Aug 1 |
| Nashua | Apr 1 – June 1 | July 1 – Aug 1 |
| Portsmouth | Apr 1 – June 1 | July 1 – Aug 1 |
| Rochester | Apr 1 – June 1 | July 1 – Aug 1 |
| Somersworth | Apr 1 – June 1 | July 1 – Aug 1 |
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 collards.