Groveton, New Hampshire, sits in USDA hardiness zone 4b — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
Reliable performers under these conditions include cabbage, cranberry, cilantro, and collard greens; what your own ground favors still comes down to its soil, sun, and drainage.
Even in Groveton, no two yards are alike.
A low spot, a south-facing slope, or a stand of trees moves the frost date and sun across a single Groveton lot. Enter your address and we'll score 1,086 plants against your land's actual soil, sun, and frost.
We read public map data around Groveton — soil, climate, flood, and parcel records. How we handle your address.
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Groveton — the short answer
Groveton, New Hampshire: USDA zone 4b, about 149 days between hard freezes, across 1K acres of town.
- USDA zone
- 4b
- USDA PHZM 2023
- Last hard freeze (28°F)
- May 10
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 6
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~149
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 1K acres
- US Census TIGER/Line 2025
Every figure names the dataset it came from. Hard-freeze dates are this town’s own 28°F normals: light frosts run a few weeks past them, and tender transplants usually wait 2–3 weeks after the last hard freeze.
Hardiness Zone Range
Zone 4b is Groveton's average, not your lot's — a low corner or a tree line moves it. Against Groveton's 149-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Groveton
Each reading below is measured for Groveton itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredGroveton runs about 149 days between hard freezes — a short growing season.
Long-maturing crops like melons, sweet potatoes, and winter squash can run out of runway before the first hard freeze, ripening late or not at all.
Lead with fast-maturing varieties, and stretch the season on both ends with cold frames, low tunnels, or a greenhouse.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredGroveton sits in USDA hardiness zone 4b.
The zone sets which perennials, shrubs, and fruit trees live through an average winter here — a plant rated for a colder zone is a safe bet, one rated warmer needs winter protection or gets treated as an annual.
Match perennials and fruit to the zone before you buy, so nothing you plant is a gamble against the cold.
USDA PHZM 2023
The kind of country Groveton is in
Groveton sits in the Northeastern Highlands — EPA Level III, inside the wider Northern Forests. That is read at Groveton's own centroid rather than borrowed from Coos County.
What Grows in Groveton
Every plant below cleared Groveton's own zone 4b and its 149-day season. Each card opens that plant's New Hampshire profile. How we score.
Is it too late to plant in Groveton?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Apr 12; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near May 10 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 6 — long-season crops need about 90 days of runway, quick greens only 30. In a season this compact, fast finishers and cold-hardy greens do the late work, and garlic tucked in before the freeze repays you next summer.
Documented around Groveton
Survey cells within 31 miles of Groveton checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 63 miles off. What to watch for.
What's on the federal record near Groveton
Closest first, within ~10 miles of Groveton. Listing isn't leaking, and distance isn't exposure.
- BELL ATLANTICUnderground Storage Tanks · 0.5 mi
- GROVETON TEXACOUnderground Storage Tanks · 0.9 mi
- PERRAS LUMBER INCUnderground Storage Tanks · 0.9 mi
- CLOVERKIST FARMUnderground Storage Tanks · 0.9 mi
- FORMER TOP GAS STATIONUnderground Storage Tanks · 0.9 mi
- C B CUMMINGS AND SONS COUnderground Storage Tanks · 0.9 mi
- CURRIER SALES & SERVICE CORPUnderground Storage Tanks · 0.9 mi
- RIVERSIDE TRANSPORTATIONUnderground Storage Tanks · 0.9 mi
- GROVETON PAPER BOARDToxics Release Inventory · 0.9 mi
- GROVETON PAPER BOARD MILL (FORMER)Toxics Release Inventory · 0.9 mi
- GROVETON CITGOUnderground Storage Tanks · 1.0 mi
- NH DOT PS 104Underground Storage Tanks · 1.0 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Groveton's center, not your beds. Run your own address for what's upwind of you specifically.
Environmental Intelligence
The counts behind that headline — every source type on the record near Groveton.
Total Sites
121
within ~10 miles of Groveton
Risk Level
Elevated
Highest-severity
1 Superfund site (none NPL-listed)
Sources Checked
within ~10 miles of Groveton
Severity Distribution
within ~10 miles of Groveton
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Groveton, Nitrate runs higher than the national average — 38 sites within ~10 miles of Groveton. It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
Nitrate: Nitrate contamination primarily comes from agricultural fertilizer runoff and failing septic systems.
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Check your specific parcel in Groveton
Get exact proximity distances to contamination sources for your specific parcel — plus soil, sun, drainage, and 1,086 plant recommendations.
25+ data sources read at your address, not the Groveton average
Your land is one point inside Groveton
Everything above resolves to Groveton as a whole — one PHZM band and one 28°F frost record, read across 1K acres. Your parcel is one point inside that footprint. Slope, tree cover, a low spot that pools cold air, and what is in the soil are all resolved at the address, and none of them are visible at town scale. That is the honest boundary of this page, and the reason the next step is a reading of your own ground rather than a better local average.
Your Lot vs the Groveton Average
Groveton Average
- ●USDA Zones 4b, averaged across Groveton
- ●One soil character for all of Groveton
- ●Frost dates read at Groveton's scale: May 10 to Oct 6
YOUR Parcel
- ✓Your exact zone, not Groveton's 4b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Groveton
Pull a site-specific report for your exact address in Groveton, New Hampshire — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Groveton averages can't show:
We read public map data around Groveton — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Groveton average
How we know this about Groveton
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at this town’s own centroid; hard-freeze dates from NOAA 1991–2020 28°F normals at Groveton’s own record; boundaries and acreage from US Census TIGER/Line 2025; the contamination records from the federal sources named in their beats above. Soil is not read at town grain anywhere on this page — there is no town-resolution survey in our data, which is why you will find no soil grid here rather than a statewide one wearing a local label. The resolution ledger below names every figure this page inherited.
Common questions about Groveton
When does frost risk typically end in Groveton?
The last hard freeze (28°F) in Groveton typically lands around May 10, per NOAA 1991–2020 climate normals — earlier than the light-frost dates most charts quote. That marks the hard freeze, not the last light frost — lighter frosts keep biting past it, which is why tender transplants here wait until about May 31.
When is the first frost in Groveton?
The first hard freeze (28°F) in Groveton typically arrives around Oct 6, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Sep 22, so the watching starts about Sep 6 — about 149 days after the spring freeze cleared.
How long is the growing season in Groveton?
Measured between 28°F hard freezes, Groveton sees about 149 frost-free days — roughly May 10 through Oct 6, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 31 to Sep 22, about 114 days.
Is the soil safe to grow vegetables in Groveton?
The federal record around Groveton is a meaningful one — 121 documented sites, mostly Underground Storage Tanks entries (52), the nearest Underground Storage Tanks record about 0.5 miles out — so a soil test before new food beds is a sensible precaution here, not a reason to hold back from growing. Remember that proximity to a documented site is information, not a diagnosis of any one yard; the contamination map shows exactly what sits where.
How do gardeners stretch the season in Groveton?
With about 149 frost-free days between hard freezes, Groveton rewards the classic extension moves: floating row cover buys roughly two to four extra weeks at each shoulder — on this season that is a working window nearer 177 to 205 days — and cold frames or low tunnels buy more. Starting transplants indoors ahead of the May 10 hard-freeze normal stretches the season without touching the calendar.
Everything above is measured at Groveton's scale — its 4b band and its 149-day season. Your yard writes its own version of Groveton's numbers: we read soil, sun, drainage and frost at your exact address. Try it for 14 days — no card required.
What this page reads at Groveton’s own scale
7 of the readings below were taken at Groveton's own scale — its own ~149-day season between 28°F freezes, the 1,318 acres it covers and 121 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Groveton's own USDA hardiness band, zones 4bUSDA PHZM 2023
- Groveton's own 28°F hard-freeze dates, about May 10 and Oct 6 and the ~149-day span between themNOAA 1991–2020 Climate Normals
- 121 documented contamination sites on the federal record near Groveton, the closest Underground Storage Tanks record about 0.5 miles out from the town centreFederal environmental registers
- Groveton's boundary and the 1,318 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 4b and a ~149-day seasonGrowable Ground crop-matching engine
- The ecoregion at Groveton's own centroid, the Northeastern HighlandsUS EPA Level III Ecoregions
- Lanternfly survey cells around Groveton checked, none carrying a detectionlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Groveton's 1,318 acres read through its county's SSURGO summaryfrom Coos County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Coos County
- The growing challenges every New Hampshire grower plans around — written at state scale, so they stay on the state guidefrom New Hampshire
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Coos County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Groveton's 1,318 acreswhy one lot differs from the next →
- Which side of Groveton you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 1,318 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.5 miles out, measured from the town centrehow we read the record →
- Where cold air settles, which slopes face the sun, and which way the wind runs on your own ground — measured at your address, and averaged away by any Groveton-wide figureread your own land →
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