When to Plant Potatoes in New Hampshire
In New Hampshire, the time to plant potatoes outside runs from Apr 8 – Apr 22 in Nashua to May 2 – May 16 in Berlin. In Manchester, it's Apr 9 – Apr 23. The average last spring frost differs by about 3 weeks across the state (Apr 29 in Nashua, May 23 in Berlin), so use the dates for the town nearest you.
Plant seed potatoes a few weeks before the last frost; cover any shoots if a late frost threatens.
- Plant outside: 1–3 weeks before the last frost.
Potatoes planting dates in New Hampshire by city
| City | Zone | Plant outside |
|---|---|---|
| Berlin | 4b | May 2 – May 16 |
| Claremont | 5b | Apr 23 – May 7 |
| Concord | 5b | Apr 17 – May 1 |
| Dover | 6a | Apr 12 – Apr 26 |
| Franklin | 5b | Apr 16 – Apr 30 |
| Keene | 5b | Apr 23 – May 7 |
| Laconia | 5b | Apr 9 – Apr 23 |
| Lebanon | 5a | Apr 18 – May 2 |
| Manchester | 6a | Apr 9 – Apr 23 |
| Nashua | 6a | Apr 8 – Apr 22 |
| Portsmouth | 6a | Apr 13 – Apr 27 |
| Rochester | 6a | Apr 9 – Apr 23 |
| Somersworth | 6a | Apr 9 – Apr 23 |
Calculated from each town's average (50%) frost dates, from the nearest NOAA station (1991–2020). Typical dates for the 2027 planting season, based on NOAA's 1991–2020 averages. They are long-term odds, not a forecast: always check your local forecast before planting. Zones: 2023 USDA Plant Hardiness Zone Map (USDA-ARS and Oregon State University). Not the official map; see planthardiness.ars.usda.gov.
See all frost dates in New Hampshire, or the general guide to when to plant potatoes.
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