New Knoxville, Ohio, sits in USDA hardiness zone 6a — a zone band wide enough that plant choice, not possibility, is the interesting question.
Well-matched crops include cabbage, hazelnut, lavender, and collard greens, and the gap between "grows in the area" and "grows in your yard" is closed by soil, sun, and drainage.
Even in New Knoxville, 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 Knoxville 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 Knoxville — soil, climate, flood, and parcel records. How we handle your address.
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New Knoxville — the short answer
New Knoxville, Ohio: USDA zone 6a, about 210 days between hard freezes, across 620 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
- 620 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 Knoxville's average, not your lot's — a low corner or a tree line moves it. Against New Knoxville'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 Knoxville
Each reading below is measured for New Knoxville itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredNew Knoxville 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 Knoxville 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 Knoxville is in
New Knoxville sits in the Eastern Corn Belt Plains — EPA Level III, inside the wider Eastern Temperate Forests. That is read at New Knoxville's own centroid rather than borrowed from Auglaize County.
What Grows in New Knoxville
Every plant below cleared New Knoxville'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 Knoxville?
For most of the year, no — what changes is which crops still fit the days remaining. 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. Here the season winds down slowly: late sowings, a real autumn harvest, and garlic in the ground before the first hard freeze.
Documented around New Knoxville
Survey cells within 31 miles of New Knoxville checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 46 miles off. What to watch for.
What's on the federal record near New Knoxville
Closest first, within ~10 miles of New Knoxville. Listing isn't leaking, and distance isn't exposure.
- LAGEMAN GARAGEBrownfields · 75 ft
- KATTERHEINRICH MOTOR SALES INC.Underground Storage Tanks · 650 ft
- VILLAGE OF NEW KNOXVILLE GARAGEUnderground Storage Tanks · 700 ft
- KATTERHEINRICH MOTOR SALES INCBrownfields · 750 ft
- VILLAGE MARKET & DELIUnderground Storage Tanks · 1100 ft
- BROOKSIDE LABORATORIES *Brownfields · 1200 ft
- HOGE LUMBER COBrownfields · 1400 ft
- HOGE LUMBER COToxics Release Inventory · 1400 ft
- AUGLAIZE COUNTY AIRPORTUnderground Storage Tanks · 2300 ft
- CROWN EQUIPMENT CORPToxics Release Inventory · 2600 ft
- CROWN EQUIPMENT CORPBrownfields · 2600 ft
- NEIL ARMSTRONG AIRPORT HANGER EUnderground Storage Tanks · 0.7 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from New Knoxville'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 Knoxville.
Total Sites
253
within ~10 miles of New Knoxville
Risk Level
Elevated
Highest-severity
36 Toxics Release Inventory facilities
Sources Checked
within ~10 miles of New Knoxville
Severity Distribution
within ~10 miles of New Knoxville
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around New Knoxville, two things run higher than the national average within ~10 miles of New Knoxville — Toxics Release Inventory (36 sites) and PFAS (3 sites). It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
Toxics Release Inventory: TRI facilities report annual chemical releases to air, water, and land.
PFAS: PFAS (per- and polyfluoroalkyl substances) are called "forever chemicals" because they do not biodegrade.
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Test irrigation water source — this is the primary pathway for PFAS to reach garden crops.
Check your specific parcel in New Knoxville
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 Knoxville average
Your land is one point inside New Knoxville
Everything above resolves to New Knoxville as a whole — one PHZM band and one 28°F frost record, read across 620 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 Knoxville Average
New Knoxville Average
- ●USDA Zones 6a, averaged across New Knoxville
- ●One soil character for all of New Knoxville
- ●Frost dates read at New Knoxville's scale: Apr 8 to Nov 4
YOUR Parcel
- ✓Your exact zone, not New Knoxville's 6a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in New Knoxville
Pull a site-specific report for your exact address in New Knoxville, Ohio — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that New Knoxville averages can't show:
We read public map data around New Knoxville — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the New Knoxville average
How we know this about New Knoxville
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 Knoxville’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 Knoxville
When does frost risk typically end in New Knoxville?
The last hard freeze (28°F) in New Knoxville 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 Knoxville?
The first hard freeze (28°F) in New Knoxville 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 Knoxville?
Measured between 28°F hard freezes, New Knoxville 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 Knoxville?
The federal record around New Knoxville is a meaningful one — 253 documented sites, mostly Underground Storage Tanks entries (116), the nearest Brownfields 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 Knoxville?
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 Knoxville's scale — its 6a band and its 210-day season. Your yard writes its own version of New Knoxville'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 Knoxville’s own scale
7 of the readings below were taken at New Knoxville's own scale — its own ~210-day season between 28°F freezes, the 620 acres it covers and 253 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- New Knoxville's own USDA hardiness band, zones 6aUSDA PHZM 2023
- New Knoxville's own 28°F hard-freeze dates, about Apr 8 and Nov 4 and the ~210-day span between themNOAA 1991–2020 Climate Normals
- 253 documented contamination sites on the federal record near New Knoxville, the closest Brownfields record under a tenth of a mile out from the town centreFederal environmental registers
- New Knoxville's boundary and the 620 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 Knoxville's own centroid, the Eastern Corn Belt PlainsUS EPA Level III Ecoregions
- Lanternfly survey cells around New Knoxville 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 Knoxville's 620 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 Knoxville's 620 acreswhy one lot differs from the next →
- Which side of New Knoxville you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 620 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields 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 Knoxville-wide figureread your own land →
More in Ohio
Wider growing context
What grows across OhioNew Knoxville sits outside our named growing regions, so Ohio as a whole is its closest context here.
Nearby growing guides