When to plant in Derry, NH
USDA Zone 6aDerry, New Hampshire frost dates, USDA zone, and a full-year planting calendar, drawn from the nearest NOAA station and tuned to the local season.
In zone 6a, Derry gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
Frost probability
W HAMPSTEAD · 1991–2020The date the last spring and first fall frost occur, by threshold and probability. A 90% date is later in spring — and earlier in fall — than a 10% date; the 50% · 32°F row is what most gardeners plan around. These are Derry’s own odds, recorded at W HAMPSTEAD.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 25 | May 13 | May 1 | Sep 19 | Oct 1 | Oct 14 |
| 32°F | May 14 | Apr 30 | Apr 20 | Sep 29 | Oct 11 | Oct 27 |
| 28°F | May 1 | Apr 18 | Apr 5 | Oct 8 | Oct 24 | Nov 7 |
Download this table as CSV ↓ — every threshold and probability, plus this city’s planting-window dates.
What to plant now
TODAY · JULY 19Full-year planting calendar
Each bar is the exact window to take a planting action in Derry, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 14 km · complete 32°F normalsWhen stations disagree by more than a few days, that spread is real microclimate variation — elevation, water, urban heat. Judge which station best matches your own yard.
Derry planting FAQ
When is the last spring frost in Derry, NH?
Plan for the last spring frost in Derry around April 30 (the date it has a 50% chance of a 32°F freeze). Anything frost-sensitive should go out after it.
When is the first fall frost in Derry, NH?
In Derry, the first 32°F freeze of fall lands around October 11 on average. Time your last harvests and any season-extension cover before it.
What hardiness zone is Derry in?
Derry is in USDA hardiness zone 6a. In zone 6a, winters are moderate — most common vegetables grow well in season.
How long is the growing season in Derry?
Derry has about 164 frost-free days — a moderate growing season — between the average last spring frost (April 30) and first fall frost (October 11).
When should I plant tomatoes in Derry?
For Derry, sow tomatoes indoors about March 5–March 19 and move the seedlings out around May 7, after the last spring frost.
Never miss a window in Derry
An email when it’s time to start seeds, transplant, and sow — timed to Derry’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Londonderry · 8 km
- Manchester · 17 km
- Methuen · 18 km
- Haverhill · 20 km
- Nashua · 23 km
- Lawrence · 23 km
- Amesbury · 27 km
- Lowell · 28 km
Frost dates recorded at W HAMPSTEAD, 7 km from the city center · 1991–2020 NOAA climate normals · zone from the USDA/PRISM 2023 map. How we compute this.
BlissGarden. "When to Plant in Derry, NH — Frost Dates & Zone 6a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00279278. Retrieved from https://blissgarden.com/new-hampshire/derry.