New Hampshire planting calendars
Planting calendars, USDA hardiness zones, and average frost dates for 48 New Hampshire locations (Berlin, NH, Berlin, NH, Bristol, NH, Charlestown, NH, Claremont, NH, Colebrook, NH, Concord, NH, Conway, NH, Conway, NH, Derry, NH, Franklin, NH, Franklin, NH, and 36 more). Pick a location to see its zone, average last and first frost dates, growing-season length, and a printable per-crop planting calendar, all from public NOAA and USDA data.
Locations in New Hampshire
| Location | USDA zone | Last frost | First frost | Season (days) |
|---|---|---|---|---|
| Berlin | 4b −25 to −20 °F | May 14 | Sep 30 | 135 |
| Berlin | 4b −25 to −20 °F | May 30 | Sep 19 | 112 |
| Bristol | 5a −20 to −15 °F | May 21 | Sep 26 | 127 |
| Charlestown | 6a −10 to −5 °F | May 14 | Oct 1 | 140 |
| Claremont | 5b −15 to −10 °F | May 14 | Oct 1 | 140 |
| Colebrook | 4a −30 to −25 °F | May 31 | Sep 21 | 112 |
| Concord | 5b −15 to −10 °F | May 8 | Oct 3 | 146 |
| Conway | 5a −20 to −15 °F | May 17 | Sep 25 | 128 |
| Conway | 5a −20 to −15 °F | May 16 | Sep 26 | 129 |
| Derry | 6a −10 to −5 °F | May 7 | Oct 4 | 148 |
| Franklin | 5b −15 to −10 °F | May 7 | Oct 3 | 148 |
| Franklin | 5b −15 to −10 °F | Apr 30 | Oct 18 | 170 |
| Franklin | 5b −15 to −10 °F | May 14 | Sep 29 | 138 |
| Goffstown | 6a −10 to −5 °F | May 2 | Oct 8 | 158 |
| Gorham | 5a −20 to −15 °F | May 14 | Sep 30 | 135 |
| Gorham | 5a −20 to −15 °F | May 18 | Oct 1 | 135 |
| Groveton | 4b −25 to −20 °F | May 23 | Sep 22 | 122 |
| Groveton | 4a −30 to −25 °F | May 19 | Sep 29 | 131 |
| Hanover | 5a −20 to −15 °F | May 1 | Oct 13 | 162 |
| Henniker | 5b −15 to −10 °F | May 6 | Oct 1 | 146 |
| Jaffrey | 5b −15 to −10 °F | May 5 | Oct 6 | 152 |
| Keene | 5b −15 to −10 °F | May 14 | Oct 1 | 138 |
| Keene | 6a −10 to −5 °F | May 14 | Oct 1 | 138 |
| Lancaster | 4b −25 to −20 °F | May 18 | Sep 30 | 132 |
| Lebanon | 5a −20 to −15 °F | May 9 | Oct 6 | 148 |
| Lincoln | 5a −20 to −15 °F | May 7 | Oct 4 | 149 |
| Lisbon | 5a −20 to −15 °F | May 24 | Sep 18 | 116 |
| Littleton | 4b −25 to −20 °F | May 24 | Sep 18 | 116 |
| Londonderry | 6a −10 to −5 °F | May 3 | Oct 8 | 156 |
| Manchester | 6a −10 to −5 °F | Apr 30 | Oct 11 | 164 |
| Manchester | 6a −10 to −5 °F | Apr 21 | Oct 19 | 180 |
| Melvin | 5b −15 to −10 °F | May 16 | Sep 26 | 129 |
| Milton | 5b −15 to −10 °F | Apr 30 | Oct 9 | 161 |
| Nashua | 6a −10 to −5 °F | Apr 30 | Oct 12 | 165 |
| New London | 5b −15 to −10 °F | May 2 | Oct 9 | 158 |
| Newport | 6a −10 to −5 °F | May 2 | Oct 9 | 158 |
| Newport | 5a −20 to −15 °F | May 14 | Oct 1 | 140 |
| North Conway | 5b −15 to −10 °F | May 7 | Oct 5 | 150 |
| North Conway | 5a −20 to −15 °F | May 7 | Oct 5 | 150 |
| North Woodstock | 5b −15 to −10 °F | May 15 | Sep 28 | 133 |
| Peterborough | 6a −10 to −5 °F | May 5 | Oct 6 | 152 |
| Plymouth | 5a −20 to −15 °F | May 20 | Sep 27 | 128 |
| Plymouth | 5b −15 to −10 °F | May 20 | Sep 27 | 128 |
| Portsmouth | 6a −10 to −5 °F | May 4 | Oct 8 | 157 |
| Rochester | 6a −10 to −5 °F | May 8 | Oct 4 | 148 |
| Rochester | 6a −10 to −5 °F | Apr 30 | Oct 9 | 161 |
| Suncook | 6a −10 to −5 °F | May 8 | Oct 3 | 146 |
| Whitefield | 4b −25 to −20 °F | May 27 | Sep 19 | 116 |
Data: NOAA NCEI U.S. Climate Normals 1991–2020 (public domain) and USDA Plant Hardiness Zone Map 2023. Planting windows synthesized from U.S. Cooperative Extension guides.
More ways to explore
Browse by USDA hardiness zone, see when to plant common crops, or read the methodology behind every figure. This site lists 48 New Hampshire locations, mapping every ZIP in the state to its nearest weather station with a full 30-year record.