New Hampshire, Ohio, sits in USDA hardiness zone 6a — a zone band wide enough that plant choice, not possibility, is the interesting question.
These conditions suit cabbage, hazelnut, lavender, and collard greens — a starting list any specific site will trim or extend with its own soil, sun, and drainage.
Even in New Hampshire, 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 New Hampshire 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 New Hampshire — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
New Hampshire — the short answer
New Hampshire, Ohio: USDA zone 6a, about 210 days between hard freezes, across 390 acres of town.
- USDA zone
- 6a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 8
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 4
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~210
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 390 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 6a is New Hampshire's average, not your lot's — a low corner or a tree line moves it. Against New Hampshire's 210-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in New Hampshire
Each reading below is measured for New Hampshire itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredNew Hampshire runs about 210 days between hard freezes — a long growing season.
There is slack for succession plantings and slow-finishing crops: many vegetables can be sown twice, and the heat-lovers have time to ripen fully.
Plan a second sowing of quick crops after the first comes out, and use the fall window most gardeners let sit idle.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredNew Hampshire sits in USDA hardiness zone 6a.
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 New Hampshire is in
New Hampshire sits in the Eastern Corn Belt Plains — EPA Level III, inside the wider Eastern Temperate Forests. That is read at New Hampshire's own centroid rather than borrowed from Auglaize County.
What Grows in New Hampshire
Every plant below cleared New Hampshire's own zone 6a and its 210-day season. Each card opens that plant's Ohio profile. How we score.
Is it too late to plant in New Hampshire?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Mar 11; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 8 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 4 — long-season crops need about 90 days of runway, quick greens only 30. There is slack in a calendar like this — late plantings, second rounds of favorites, and a fall bench that keeps beds working.
Documented around New Hampshire
Survey cells within 31 miles of New Hampshire checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 45 miles off. What to watch for.
What's on the federal record near New Hampshire
Closest first, within ~10 miles of New Hampshire. Listing isn't leaking, and distance isn't exposure.
- VACANTUnderground Storage Tanks · 300 ft
- BETHEL ENGINEERINGBrownfields · 700 ft
- NORTHWOOD ASPHALT PRODUCTSBrownfields · 800 ft
- WAYNESFIELD RUBBER FIRESuperfund · 1.5 mi
- WAYNESFIELD CARRYOUTUnderground Storage Tanks · 3.2 mi
- LAKEVIEW MARATHONUnderground Storage Tanks · 3.3 mi
- ODNR INDIAN LAKE STATE PARKUnderground Storage Tanks · 3.3 mi
- 19TH HOLE RESTAURANT & LOUNGEUnderground Storage Tanks · 3.3 mi
- WAYNESFIELD-GOSHEN SCHOOLUnderground Storage Tanks · 3.3 mi
- WAYNESFIELD STOCKYARDUnderground Storage Tanks · 3.4 mi
- INDIAN LAKE STATE PARK CAMPGRNDUnderground Storage Tanks · 3.4 mi
- SNUG HARBORUnderground Storage Tanks · 3.4 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from New Hampshire'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 New Hampshire.
Total Sites
74
within ~10 miles of New Hampshire
Risk Level
Elevated
Highest-severity
1 Superfund site (none NPL-listed)
Sources Checked
within ~10 miles of New Hampshire
Severity Distribution
within ~10 miles of New Hampshire
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around New Hampshire, Toxics Release Inventory runs higher than the national average — 6 sites within ~10 miles of New Hampshire. That's not a problem with your land — it's information about it.
Toxics Release Inventory: TRI facilities report annual chemical releases to air, water, and land.
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Check your specific parcel in New Hampshire
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 New Hampshire average
Your land is one point inside New Hampshire
Everything above resolves to New Hampshire as a whole — one PHZM band and one 28°F frost record, read across 390 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 New Hampshire Average
New Hampshire Average
- ●USDA Zones 6a, averaged across New Hampshire
- ●One soil character for all of New Hampshire
- ●Frost dates read at New Hampshire's scale: Apr 8 to Nov 4
YOUR Parcel
- ✓Your exact zone, not New Hampshire's 6a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in New Hampshire
Pull a site-specific report for your exact address in New Hampshire, Ohio — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that New Hampshire averages can't show:
We read public map data around New Hampshire — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the New Hampshire average
How we know this about New Hampshire
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 New Hampshire’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 New Hampshire
When does frost risk typically end in New Hampshire?
The last hard freeze (28°F) in New Hampshire typically lands around Apr 8, 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 Apr 29.
When is the first frost in New Hampshire?
The first hard freeze (28°F) in New Hampshire typically arrives around Nov 4, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 21, so the watching starts about Oct 5 — about 210 days after the spring freeze cleared.
How long is the growing season in New Hampshire?
Measured between 28°F hard freezes, New Hampshire sees about 210 frost-free days — roughly Apr 8 through Nov 4, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 29 to Oct 21, about 175 days.
Is the soil safe to grow vegetables in New Hampshire?
The federal record around New Hampshire is a meaningful one — 74 documented sites, mostly Underground Storage Tanks entries (44), the nearest Underground Storage Tanks record under a tenth of a mile 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 I protect my plants from frost in New Hampshire?
From about Oct 5 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 Nov 4 (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 Nov 4. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at New Hampshire's scale — its 6a band and its 210-day season. Your yard writes its own version of New Hampshire'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 New Hampshire’s own scale
7 of the readings below were taken at New Hampshire's own scale — its own ~210-day season between 28°F freezes, the 390 acres it covers and 74 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- New Hampshire's own USDA hardiness band, zones 6aUSDA PHZM 2023
- New Hampshire's own 28°F hard-freeze dates, about Apr 8 and Nov 4 and the ~210-day span between themNOAA 1991–2020 Climate Normals
- 74 documented contamination sites on the federal record near New Hampshire, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- New Hampshire's boundary and the 390 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6a and a ~210-day seasonGrowable Ground crop-matching engine
- The ecoregion at New Hampshire's own centroid, the Eastern Corn Belt PlainsUS EPA Level III Ecoregions
- Lanternfly survey cells around New Hampshire 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 New Hampshire's 390 acres read through its county's SSURGO summaryfrom Auglaize County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Auglaize County
- The growing challenges every Ohio grower plans around — written at state scale, so they stay on the state guidefrom Ohio
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Auglaize County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among New Hampshire's 390 acreswhy one lot differs from the next →
- Which side of New Hampshire you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 390 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record under a tenth of a mile 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 New Hampshire-wide figureread your own land →
More in Ohio
Wider growing context
What grows across OhioNew Hampshire sits outside our named growing regions, so Ohio as a whole is its closest context here.
Nearby growing guides