Carbon Hill, Ohio, sits in USDA hardiness zone 6a — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
Crops well matched to these conditions include cabbage, hazelnut, lavender, and collard greens — though what thrives on any one site still turns on its specific soil, sun, and drainage.
Even in Carbon Hill, 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 Carbon Hill 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 Carbon Hill — soil, climate, flood, and parcel records. How we handle your address.
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Carbon Hill — the short answer
Carbon Hill, Ohio: USDA zone 6a, about 192 days between hard freezes, across 259 acres of town.
- USDA zone
- 6a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 17
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 26
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~192
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 259 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 Carbon Hill's average, not your lot's — a low corner or a tree line moves it. Against Carbon Hill's 192-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Carbon Hill
Each reading below is measured for Carbon Hill itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredCarbon Hill runs about 192 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
MeasuredCarbon Hill 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 Carbon Hill is in
Carbon Hill sits in the Western Allegheny Plateau — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Carbon Hill's own centroid rather than borrowed from Hocking County.
What Grows in Carbon Hill
Every plant below cleared Carbon Hill's own zone 6a and its 192-day season. Each card opens that plant's Ohio profile. How we score.
Is it too late to plant in Carbon Hill?
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 20; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 17 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 26 — 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.
Documented around Carbon Hill
Survey cells within 31 miles of Carbon Hill checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 39 miles off. What to watch for.
What's on the federal record near Carbon Hill
Closest first, within ~10 miles of Carbon Hill. Listing isn't leaking, and distance isn't exposure.
- HOCKING CORRECTIONAL FACILITYUnderground Storage Tanks · 2.2 mi
- OHIO BELL TELEPHONE CO. L36703Underground Storage Tanks · 2.8 mi
- FRUTH PHARMACY #22Brownfields · 2.9 mi
- GO-MART STORE #113Underground Storage Tanks · 2.9 mi
- NELSONVILLE CITY BUILDINGUnderground Storage Tanks · 3.0 mi
- COLUMBUS SOUTHERN POWER CO.Underground Storage Tanks · 3.0 mi
- GENERAL CLAY PRODUCTSUnderground Storage Tanks · 3.4 mi
- MICHAEL BAILEYUnderground Storage Tanks · 3.4 mi
- CERTIFIED OIL CO. #123Underground Storage Tanks · 3.4 mi
- GREENLAWN CEMENTERYUnderground Storage Tanks · 3.4 mi
- HOCKING COLLEGEUnderground Storage Tanks · 3.4 mi
- JUDY SHEETSUnderground Storage Tanks · 3.4 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Carbon Hill'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 Carbon Hill.
Total Sites
150
within ~10 miles of Carbon Hill
Risk Level
Elevated
Highest-severity
2 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Carbon Hill
Severity Distribution
within ~10 miles of Carbon Hill
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Carbon Hill, PFAS runs higher than the national average — 3 sites within ~10 miles of Carbon Hill. That's not a problem with your land — it's information about it.
PFAS: PFAS (per- and polyfluoroalkyl substances) are called "forever chemicals" because they do not biodegrade.
Test irrigation water source — this is the primary pathway for PFAS to reach garden crops.
Check your specific parcel in Carbon Hill
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 Carbon Hill average
Your land is one point inside Carbon Hill
Everything above resolves to Carbon Hill as a whole — one PHZM band and one 28°F frost record, read across 259 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 Carbon Hill Average
Carbon Hill Average
- ●USDA Zones 6a, averaged across Carbon Hill
- ●One soil character for all of Carbon Hill
- ●Frost dates read at Carbon Hill's scale: Apr 17 to Oct 26
YOUR Parcel
- ✓Your exact zone, not Carbon Hill's 6a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Carbon Hill
Pull a site-specific report for your exact address in Carbon Hill, Ohio — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Carbon Hill averages can't show:
We read public map data around Carbon Hill — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Carbon Hill average
How we know this about Carbon Hill
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 Carbon Hill’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 Carbon Hill
When does frost risk typically end in Carbon Hill?
The last hard freeze (28°F) in Carbon Hill typically lands around Apr 17, 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 8.
When is the first frost in Carbon Hill?
The first hard freeze (28°F) in Carbon Hill typically arrives around Oct 26, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 12, so the watching starts about Sep 26 — about 192 days after the spring freeze cleared.
How long is the growing season in Carbon Hill?
Measured between 28°F hard freezes, Carbon Hill sees about 192 frost-free days — roughly Apr 17 through Oct 26, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 8 to Oct 12, about 157 days.
Is the soil safe to grow vegetables in Carbon Hill?
The federal record around Carbon Hill is a meaningful one — 150 documented sites, mostly Underground Storage Tanks entries (83), the nearest Underground Storage Tanks record about 2.2 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 I protect my plants from frost in Carbon Hill?
From about Sep 26 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 26 (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 26. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Carbon Hill's scale — its 6a band and its 192-day season. Your yard writes its own version of Carbon Hill'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 Carbon Hill’s own scale
7 of the readings below were taken at Carbon Hill's own scale — its own ~192-day season between 28°F freezes, the 259 acres it covers and 150 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Carbon Hill's own USDA hardiness band, zones 6aUSDA PHZM 2023
- Carbon Hill's own 28°F hard-freeze dates, about Apr 17 and Oct 26 and the ~192-day span between themNOAA 1991–2020 Climate Normals
- 150 documented contamination sites on the federal record near Carbon Hill, the closest Underground Storage Tanks record about 2.2 miles out from the town centreFederal environmental registers
- Carbon Hill's boundary and the 259 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6a and a ~192-day seasonGrowable Ground crop-matching engine
- The ecoregion at Carbon Hill's own centroid, the Western Allegheny PlateauUS EPA Level III Ecoregions
- Lanternfly survey cells around Carbon Hill 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 Carbon Hill's 259 acres read through its county's SSURGO summaryfrom Hocking County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Hocking 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 Hocking County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Carbon Hill's 259 acreswhy one lot differs from the next →
- Which side of Carbon Hill you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 259 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 2.2 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 Carbon Hill-wide figureread your own land →
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