When to plant in Hampton, NH
USDA Zone 6aEverything below — frost dates, hardiness zone, and what to plant when in Hampton, New Hampshire — is derived from the closest NOAA station with complete climate normals.
In zone 6a, Hampton gardeners can grow many hardy perennials, while the last and first frost still dictate the annual vegetable calendar.
The average last spring frost in Hampton is now 6 days earlier than in the 1981–2010 normals. See how frost dates are shifting nationwide →
Frost probability
GREENLAND · 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 Hampton’s own odds, recorded at GREENLAND.
| Threshold | SPRING 10% | SPRING 50% | SPRING 90% | FALL 10% | FALL 50% | FALL 90% |
|---|---|---|---|---|---|---|
| 36°F | May 29 | May 16 | May 3 | Sep 16 | Sep 30 | Oct 10 |
| 32°F | May 18 | May 4 | Apr 23 | Sep 27 | Oct 8 | Oct 24 |
| 28°F | May 7 | Apr 23 | Apr 7 | Oct 5 | Oct 21 | Nov 5 |
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 Hampton, drawn to the day from the local frost dates. The dashed line is today.
Nearby weather stations
3 within 23 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.
Hampton planting FAQ
When is the last spring frost in Hampton, NH?
On average, the last spring frost in Hampton is around May 4 (50% probability at 32°F, from 1991–2020 NOAA normals). Wait until after this date to set out tender plants like tomatoes and peppers.
When is the first fall frost in Hampton, NH?
Expect Hampton's first fall frost near October 8 — a 50% chance of 32°F by that date. Bring in or cover tender crops ahead of it.
What hardiness zone is Hampton in?
Hampton 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 Hampton?
Hampton has about 157 frost-free days — a moderate growing season — between the average last spring frost (May 4) and first fall frost (October 8).
When should I plant tomatoes in Hampton?
For Hampton, sow tomatoes indoors about March 9–March 23 and move the seedlings out around May 11, after the last spring frost.
Never miss a window in Hampton
An email when it’s time to start seeds, transplant, and sow — timed to Hampton’s frost dates. Double opt-in, one-click unsubscribe, no spam.
Nearby cities
8 within reach- Portsmouth · 13 km
- Amesbury · 15 km
- Newburyport · 15 km
- Durham · 24 km
- Dover · 27 km
- Haverhill · 28 km
- Somersworth · 35 km
- Methuen · 36 km
Frost dates recorded at GREENLAND, 9 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 Hampton, NH — Frost Dates & Zone 6a." Frost normals: NOAA NCEI U.S. Climate Normals 1991–2020, station USC00273626. Retrieved from https://blissgarden.com/new-hampshire/hampton.