West Stewartstown, New Hampshire, sits in USDA hardiness zone 4a — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
Expect cabbage, cranberry, turkish rocket, and collard greens to be strong candidates here; the deciding factors on any one parcel stay local — soil, sun, and drainage.
Even in West Stewartstown, 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 West Stewartstown 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 West Stewartstown — soil, climate, flood, and parcel records. How we handle your address.
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West Stewartstown — the short answer
West Stewartstown, New Hampshire: USDA zone 4a, about 150 days between hard freezes, across 396 acres of town.
- USDA zone
- 4a
- USDA PHZM 2023
- Last hard freeze (28°F)
- May 9
- 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
- ~150
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 396 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 4a is West Stewartstown's average, not your lot's — a low corner or a tree line moves it. Against West Stewartstown's 150-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in West Stewartstown
Each reading below is measured for West Stewartstown itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredWest Stewartstown runs about 150 days between hard freezes — a moderate growing season.
There is room for the full run of cool-season crops plus a warm-season main crop, but the calendar is tight enough that a late spring or early fall frost still decides how much finishes.
Time warm-season transplants to your last hard freeze, and a few weeks of season extension turns a near-miss harvest into a sure one.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredWest Stewartstown sits in USDA hardiness zone 4a.
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 West Stewartstown is in
West Stewartstown sits in the Northeastern Highlands — EPA Level III, inside the wider Northern Forests. That is read at West Stewartstown's own centroid rather than borrowed from Coos County.
What Grows in West Stewartstown
Every plant below cleared West Stewartstown's own zone 4a and its 150-day season. Each card opens that plant's New Hampshire profile. How we score.
Is it too late to plant in West Stewartstown?
Too late for some crops, right on time for others — a growing season is a sequence, not a deadline. Cool-season crops can go in from around Apr 11; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near May 9 (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. Even past midsummer there is room for a true fall garden here, and garlic planted near the close carries the momentum into next year.
What's on the federal record near West Stewartstown
Closest first, within ~10 miles of West Stewartstown. Listing isn't leaking, and distance isn't exposure.
- COOS COUNTY FARMUnderground Storage Tanks · 2200 ft
- ARM TRUCKING INCUnderground Storage Tanks · 2600 ft
- TOWLES MINI MARTUnderground Storage Tanks · 2600 ft
- VTrans Canaan GarageUnderground Storage Tanks · 0.5 mi
- CUNNINGHAM'S FULL SERVICE STATIONBrownfields · 0.6 mi
- Cunningham Full ServiceUnderground Storage Tanks · 0.6 mi
- Canaan Town GarageUnderground Storage Tanks · 0.6 mi
- HHWC NEKWMD CANAAN TOWN GARAGEBrownfields · 0.6 mi
- COOS COUNTY NURSING HOSPITALBrownfields · 0.8 mi
- Crawford PropertyUnderground Storage Tanks · 0.8 mi
- LAFLAMME TRUCKING INCUnderground Storage Tanks · 1.3 mi
- SPA RESTAURANTUnderground Storage Tanks · 1.3 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from West Stewartstown'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 West Stewartstown.
Total Sites
87
within ~10 miles of West Stewartstown
Risk Level
Moderate
Highest-severity
1 Toxics Release Inventory facility
Sources Checked
within ~10 miles of West Stewartstown
Severity Distribution
within ~10 miles of West Stewartstown
Highest-Severity Sites
Know Before You Grow
- •Underground tanks leak petroleum as they age — near a former filling station, test the soil.
- •On a private well, test for nitrates: above 10 mg/L the water needs treatment before irrigating.
- •Near a brownfield, raised beds of imported soil give your food clean ground.
Check your specific parcel in West Stewartstown
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 West Stewartstown average
Your land is one point inside West Stewartstown
Everything above resolves to West Stewartstown as a whole — one PHZM band and one 28°F frost record, read across 396 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 West Stewartstown Average
West Stewartstown Average
- ●USDA Zones 4a, averaged across West Stewartstown
- ●One soil character for all of West Stewartstown
- ●Frost dates read at West Stewartstown's scale: May 9 to Oct 6
YOUR Parcel
- ✓Your exact zone, not West Stewartstown's 4a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in West Stewartstown
Pull a site-specific report for your exact address in West Stewartstown, New Hampshire — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that West Stewartstown averages can't show:
We read public map data around West Stewartstown — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the West Stewartstown average
How we know this about West Stewartstown
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 West Stewartstown’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 West Stewartstown
When does frost risk typically end in West Stewartstown?
The last hard freeze (28°F) in West Stewartstown typically lands around May 9, 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 30.
When is the first frost in West Stewartstown?
The first hard freeze (28°F) in West Stewartstown 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 150 days after the spring freeze cleared.
How long is the growing season in West Stewartstown?
Measured between 28°F hard freezes, West Stewartstown sees about 150 frost-free days — roughly May 9 through Oct 6, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 30 to Sep 22, about 115 days.
Is the soil safe to grow vegetables in West Stewartstown?
The federal record around West Stewartstown shows 87 documented sites, mostly Underground Storage Tanks entries (45), the nearest Underground Storage Tanks record about 0.4 miles out — a typical footprint for a growing area, and proximity to a documented site is information, not a diagnosis of any one yard. It's worth seeing which recorded sites sit closest to where you grow, and testing the soil before new food beds near any of them.
How do I protect my plants from frost in West Stewartstown?
From about Sep 6 the job here turns from planting to protecting — the last start even a 30-day crop can finish. As the season closes around the first 28°F hard freeze near Oct 6 (NOAA 1991–2020 climate normals), three moves buy time: row cover or an old sheet over tender plants on still, clear nights; water the soil the afternoon before a freeze, so it holds warmth overnight; and harvest tomatoes, peppers and basil before Oct 6. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at West Stewartstown's scale — its 4a band and its 150-day season. Your yard writes its own version of West Stewartstown'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 West Stewartstown’s own scale
6 of the readings below were taken at West Stewartstown's own scale — its own ~150-day season between 28°F freezes, the 396 acres it covers and 87 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- West Stewartstown's own USDA hardiness band, zones 4aUSDA PHZM 2023
- West Stewartstown's own 28°F hard-freeze dates, about May 9 and Oct 6 and the ~150-day span between themNOAA 1991–2020 Climate Normals
- 87 documented contamination sites on the federal record near West Stewartstown, the closest Underground Storage Tanks record about 0.4 miles out from the town centreFederal environmental registers
- West Stewartstown's boundary and the 396 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 4a and a ~150-day seasonGrowable Ground crop-matching engine
- The ecoregion at West Stewartstown's own centroid, the Northeastern HighlandsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so West Stewartstown's 396 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 West Stewartstown's 396 acreswhy one lot differs from the next →
- Which side of West Stewartstown you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 396 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.4 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 West Stewartstown-wide figureread your own land →
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