Newtown, Ohio, sits in USDA hardiness zone 6b — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
A short list that earns its place here — cabbage, hazelnut, lavender, and collard greens — with any one site's soil, sun, and drainage making the final cut.
Even in Newtown, 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 Newtown 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 Newtown — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Newtown — the short answer
Newtown, Ohio: USDA zone 6b, about 220 days between hard freezes, across 1K acres of town.
- USDA zone
- 6b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 2
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 8
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~220
- 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 6b is Newtown's average, not your lot's — a low corner or a tree line moves it. Against Newtown's 220-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Newtown
Each reading below is measured for Newtown itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredNewtown runs about 220 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
MeasuredNewtown sits in USDA hardiness zone 6b.
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 Newtown is in
Newtown sits in the Eastern Corn Belt Plains — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Newtown's own centroid rather than borrowed from Hamilton County.
What Grows in Newtown
Every plant below cleared Newtown's own zone 6b and its 220-day season. Each card opens that plant's Ohio profile. How we score.
Is it too late to plant in Newtown?
Rarely: the season closes in stages, not all at once, and each stage has its crops. Cool-season crops can go in from around Mar 5; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 2 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 8 — long-season crops need about 90 days of runway, quick greens only 30. With a season this long, “too late” mostly means “switch crops” — second sowings and a full fall garden are the norm, with garlic closing the year.
Documented around Newtown
Spotted lanternfly documented 7 miles from Newtown, first recorded 2023. What to watch for.
What's on the federal record near Newtown
Closest first, within ~10 miles of Newtown. Listing isn't leaking, and distance isn't exposure.
- COLERAIN SHELLUnderground Storage Tanks · 100 ft
- BREWER CO PLT 15Brownfields · 250 ft
- BARRETT PAVING - NEWTOWN ASPHALT (1431341269)Brownfields · 250 ft
- FIVERIVERS OIL LLCUnderground Storage Tanks · 300 ft
- RACK SEVEN PAVINGUnderground Storage Tanks · 350 ft
- THE BREWER COBrownfields · 400 ft
- COMMERCIAL BUILDINGUnderground Storage Tanks · 600 ft
- VILLAGE AUTO LUBEBrownfields · 1100 ft
- HAMILTON COUNTY ENGINEERSUnderground Storage Tanks · 1100 ft
- MERIDIAN BIOSCIENCE INCBrownfields · 1200 ft
- MERIDIAN BIOSCIENCE INCToxics Release Inventory · 1200 ft
- ROBBINS INCBrownfields · 1600 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Newtown'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 Newtown.
Sources Checked
within ~10 miles of Newtown
Severity Distribution
within ~10 miles of Newtown
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Newtown, two things run higher than the national average within ~10 miles of Newtown — Toxics Release Inventory (216 sites) and Superfund (33 sites). 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.
Superfund: Superfund sites represent the most severe contamination in the federal system.
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Check your specific parcel in Newtown
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 Newtown average
Your land is one point inside Newtown
Everything above resolves to Newtown 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 Newtown Average
Newtown Average
- ●USDA Zones 6b, averaged across Newtown
- ●One soil character for all of Newtown
- ●Frost dates read at Newtown's scale: Apr 2 to Nov 8
YOUR Parcel
- ✓Your exact zone, not Newtown's 6b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Newtown
Pull a site-specific report for your exact address in Newtown, Ohio — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Newtown averages can't show:
We read public map data around Newtown — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Newtown average
How we know this about Newtown
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 Newtown’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 Newtown
When does frost risk typically end in Newtown?
The last hard freeze (28°F) in Newtown typically lands around Apr 2, 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 23.
When is the first frost in Newtown?
The first hard freeze (28°F) in Newtown typically arrives around Nov 8, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 25, so the watching starts about Oct 9 — about 220 days after the spring freeze cleared.
How long is the growing season in Newtown?
Measured between 28°F hard freezes, Newtown sees about 220 frost-free days — roughly Apr 2 through Nov 8, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 23 to Oct 25, about 185 days.
Is the soil safe to grow vegetables in Newtown?
The federal record around Newtown runs heavier than most — 2,324 documented sites, mostly Underground Storage Tanks entries (1,344), the nearest Underground Storage Tanks record under a tenth of a mile out — so test the soil before planting food in the ground, and raised beds with clean imported soil grow well in the meantime. Even here, proximity to a documented site is information, not a diagnosis of any one yard; the contamination map shows exactly what's recorded and where.
How do I protect my plants from frost in Newtown?
From about Oct 9 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 8 (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 8. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Newtown's scale — its 6b band and its 220-day season. Your yard writes its own version of Newtown'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 Newtown’s own scale
7 of the readings below were taken at Newtown's own scale — its own ~220-day season between 28°F freezes, the 1,323 acres it covers and 2,324 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Newtown's own USDA hardiness band, zones 6bUSDA PHZM 2023
- Newtown's own 28°F hard-freeze dates, about Apr 2 and Nov 8 and the ~220-day span between themNOAA 1991–2020 Climate Normals
- 2,324 documented contamination sites on the federal record near Newtown, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- Newtown's boundary and the 1,323 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6b and a ~220-day seasonGrowable Ground crop-matching engine
- The ecoregion at Newtown's own centroid, the Eastern Corn Belt PlainsUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Newtownlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Newtown's 1,323 acres read through its county's SSURGO summaryfrom Hamilton County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Hamilton 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 Hamilton County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Newtown's 1,323 acreswhy one lot differs from the next →
- Which side of Newtown you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 1,323 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 Newtown-wide figureread your own land →
More in Ohio
Growing region
Nearby growing guides