When to Plant Garlic in New Hampshire
In New Hampshire, the time to plant garlic in fall runs from Sep 22 – Oct 20 in Berlin to Oct 18 – Nov 15 in Laconia. In Manchester, it's Oct 11 – Nov 8. The average first fall frost differs by about 4 weeks across the state (Sep 22 in Berlin, Oct 18 in Laconia), so use the dates for the town nearest you.
Garlic is planted in fall, around the first frost, and harvested the next summer. Cloves need a cold winter to form good bulbs.
- Plant: from the first fall frost up to 4 weeks after it.
Garlic planting dates in New Hampshire by city
| City | Zone | Fall planting |
|---|---|---|
| Berlin | 4b | Sep 22 – Oct 20 |
| Claremont | 5b | Oct 1 – Oct 29 |
| Concord | 5b | Oct 3 – Oct 31 |
| Dover | 6a | Oct 10 – Nov 7 |
| Franklin | 5b | Oct 3 – Oct 31 |
| Keene | 5b | Oct 1 – Oct 29 |
| Laconia | 5b | Oct 18 – Nov 15 |
| Lebanon | 5a | Oct 6 – Nov 3 |
| Manchester | 6a | Oct 11 – Nov 8 |
| Nashua | 6a | Oct 8 – Nov 5 |
| Portsmouth | 6a | Oct 8 – Nov 5 |
| Rochester | 6a | Oct 9 – Nov 6 |
| Somersworth | 6a | Oct 9 – Nov 6 |
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 garlic.
Getting beds ready? Work out how much raised bed soil, compost or mulch you need with our sister site, Yard Coverage.