Frost dates in New Hampshire
Average last frost dates in New Hampshire run from April 29 in Nashua to May 14 in Claremont.
| Place | Last frost | First frost |
|---|---|---|
| Claremont | May 14 | Oct 1 |
| Concord | May 8 | Oct 3 |
| Dover | May 3 | Oct 10 |
| Keene | May 14 | Oct 1 |
| Laconia | Apr 30 | Oct 18 |
| Lebanon | May 9 | Oct 6 |
| Manchester | Apr 30 | Oct 11 |
| Nashua | Apr 29 | Oct 8 |
| Portsmouth | May 4 | Oct 8 |
| Rochester | Apr 30 | Oct 9 |
| Somersworth | Apr 30 | Oct 9 |
Source: NOAA U.S. Climate Normals 1991–2020, nearest station to each place. Places of 10,000+ people (US Census Bureau, 2024 estimates) within 50 miles of a station.
When to plant in New Hampshire
- Asparagus
- Lima Beans
- Green Beans
- Beets
- Broccoli
- Brussels Sprouts
- Cabbage
- Chinese Cabbage
- Carrots
- Cauliflower
- Celery
- Swiss Chard
- Collard Greens
- Sweet Corn
- Cucumbers
- Eggplant
- Garlic
- Kale
- Leeks
- Lettuce
- Cantaloupe
- Okra
- Onions
- Onion Sets
- Peas
- Black-Eyed Peas
- Peppers
- Potatoes
- Radishes
- Rhubarb
- Spinach
- Summer Squash (Zucchini)
- Winter Squash
- Sweet Potatoes
- Tomatoes
- Turnips
- Watermelon