Carroll County, in Georgia, sits in USDA hardiness zone 8a — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
On paper, cabbage, fig, california poppy, and collard greens all suit these conditions — on the ground, soil, sun, and drainage make the final call.
Carroll County lies within the Piedmont — a regional growing area with its own character.
Grounded in USDA PHZM 2023 · Growable Ground suitability scoring · NOAA 1991–2020 Climate Normals
Carroll County holds more than one microclimate.
Soils and elevations shift across Carroll County, so your frost dates and drainage aren't the county average. 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 Carroll County — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Carroll County — the short answer
Carroll County, Georgia: USDA zone 8a, about 246 days between hard freezes, across 319K acres.
- USDA zone
- 8a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 16
- NOAA 1991–2020 Climate Normals, 28°F
- First hard freeze (28°F)
- Nov 17
- NOAA 1991–2020 Climate Normals, 28°F
- Days between freezes
- ~246
- NOAA 1991–2020 Climate Normals, 28°F
- County area
- 319K acres
- US Census TIGER/Line 2025
Every figure names the dataset it came from. Hard-freeze dates are county 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 8a is Carroll County's average, not your lot's — a low corner or a tree line moves it. Against Carroll County's 246-day season, see what your own ground reads.
Heat and winter chill in Carroll County
Across a year, Carroll County accumulates about 4,507 growing degree days above 50°F, about 908 fewer than the middle Georgia county — ahead of 20 of Georgia’s 159 counties. Degree days are the heat a crop actually gets to work with — more of them is more room to ripen a long-season crop before the freeze closes the window.
Winter banks about 1,586 hours below 45°F, 450 more than the Georgia middle of 1,136. Chill is what tells a fruit tree its dormancy is over, and it is set by climate rather than by anything you can build.
Grounded in PRISM Climate Group, Oregon State University — 1991–2020 monthly normals
Soil in Carroll County
Across Carroll County, the ground is predominantly Ultisols, where Madison, Hulett, and Davidson are the most extensive named soil series. The soil is generally well drained with a gravelly fine sandy loam surface. Topsoil pH runs about 4.7–5.5, strongly acidic. Rainfall drains through hydrologic group B soils.
Soil order
Ultisols
Drainage
Well drained
Prime farmland
14%
Hydric soils
0%
Soil still varies lot by lot — soil types explained.
How the ground varies across Carroll County
The USDA soil survey maps 83% of Carroll County as well drained — but another 15% drains differently: 9% somewhat poorly drained, 5% somewhat excessively drained.
Madison is the most extensive named soil at 51% of mapped acres, then Hulett (12%) and Davidson (10%).
Which of them your own lot sits on is a parcel question, not a county one. Check your address for the survey at your boundary.
What this means for growing in Carroll County
Each reading below is measured for Carroll County itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Drainage
MeasuredThe dominant soils across Carroll County are well drained, in hydrologic group B — ground that drains quickly.
The upside is soil you can work early in spring and roots that never drown; the cost is that fast-draining ground dries out fast and leaches nutrients away before plants can use them.
Work in compost and mulch to hold moisture and feed, and water more often in short doses than deep and rarely.
USDA NRCS SSURGO
Surface pH
MeasuredTopsoil across Carroll County runs about pH 4.7–5.5, on the acidic side.
Blueberries, potatoes, and rhododendrons thrive in it, but most vegetables start locking out nutrients below about pH 6.0 and grow pale and stunted no matter how much you feed them.
A measured lime application raises pH for the crops that need it — but test first, because the right rate depends on your own soil, not the county average.
USDA NRCS SSURGO
Season length
MeasuredCarroll County runs about 246 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
MeasuredCarroll County sits in USDA hardiness zone 8a.
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 Carroll County is in
Carroll County sits in the Piedmont — EPA Level III, inside the wider Eastern Temperate Forests. One consistent ecological setting across the whole county.
What Grows in Carroll County
We scored all 1,086 plants against Carroll County's own USDA zone 8a and its own 246-day season between hard freezes, using the same matching engine that runs a full parcel report. These cleared both. Sun, soil pH and drainage vary lot by lot — those are the parcel questions below. Each card opens that plant's Georgia profile.
Is it too late to plant in Carroll County?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Feb 16; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 16 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 17 — long-season crops need about 90 days of runway, quick greens only 30. A long window like this one runs successions deep into fall — and even its last weeks take quick greens and garlic.
Documented around Carroll County
- Japanese beetle1 documented records
Sighting records, so they follow observers as much as insects.
What gets applied to farmland in Carroll County
USGS estimates 8,060 lb of 2,4-d on Carroll County farmland in 2019, its largest by weight, ahead of Atrazine (1,842 lb) and Dicamba (391 lb).
Farmland across the whole county, not any one lot. Check your address for the site-by-site record.
Safe to Grow Here?
What the federal record shows across Carroll County — and how to grow with it.
We checked the federal record across Carroll County — 448 documented sites across 7 of the 9 source types we track.
The most significant on record: 6 Superfund sites (none NPL-listed). Sites tracked in EPA's Superfund program — from assessment-stage CERCLIS entries to confirmed National Priorities List cleanup sites.
There's a meaningful federal record across Carroll County — worth a look before you plant food, not a reason to hold back from growing. Proximity to a documented site is information, not a diagnosis of any one yard. A soil test before new food beds is the sensible precaution here, and the map shows exactly which sites sit where, so you can see what's actually near you.
Sources: EPA, USGS — 1.8M documented sites tracked nationwide across 9 federal source types.
What's on the federal record near Carroll County
Closest first, across Carroll County. Listing isn't leaking, and distance isn't exposure.
- METRO CARROLLTON CORPORATION INCUnderground Storage Tanks · 650 ft
- CASH EXPRESS/HANSON SHELLUnderground Storage Tanks · 700 ft
- ADAMS-MASSEY COUnderground Storage Tanks · 750 ft
- DOUGLAS & LOMASON COUnderground Storage Tanks · 900 ft
- GOODYEAR AUTO SERVICE CENTER #2146Brownfields · 1400 ft
- GOODYEAR ASC 2146Underground Storage Tanks · 1400 ft
- BLACKMONS AMOCOUnderground Storage Tanks · 1400 ft
- WALMART SUPERCENTER #722Brownfields · 1500 ft
- SOUTHWIRE COMPANY - COFER TECHNOLOGY CENTERBrownfields · 1500 ft
- WEST GA RENTSUnderground Storage Tanks · 1500 ft
- MAPLE KWIK STOPUnderground Storage Tanks · 1600 ft
- SERVICE SUPPLY COUnderground Storage Tanks · 1700 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Carroll County'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 Carroll County.
Total Sites
448
across Carroll County
Risk Level
Elevated
Highest-severity
6 Superfund sites (none NPL-listed)
Sources Checked
across Carroll County
Severity Distribution
across Carroll County
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Carroll County, two things run higher than the national average across Carroll County — Toxics Release Inventory (41 sites) and PFAS (5 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 Carroll County
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 Carroll County average
Your land is one point inside Carroll County
Everything above resolves to Carroll County as a whole — one PHZM band and one county frost record, read across 319K 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 county 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 county average.
Your Lot vs the Carroll County Average
Carroll County Average
- ●USDA Zones 8a, averaged across Carroll County
- ●One soil character for all of Carroll County
- ●Frost dates read at Carroll County's scale: Mar 16 to Nov 17
YOUR Parcel
- ✓Your exact zone, not Carroll County's 8a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your parcel in Carroll County
Pull a site-specific report for your exact address in Carroll County, Georgia — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Carroll County averages can't show:
We read public map data around Carroll County — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Carroll County average
How we know this about Carroll County
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at county grain; hard-freeze dates from NOAA 1991–2020 28°F normals at this county’s own record where one resolves, and the labelled statewide window where none does; soils from the USDA NRCS SSURGO survey, area-weighted across the county’s own map units; boundaries and acreage from US Census TIGER/Line 2025; the contamination and pesticide records from the federal sources named in their beats above. Where Carroll County carries no record of its own, the figure is inherited and labelled — the resolution ledger below names each.
Common questions about Carroll County
When does frost risk typically end in Carroll County?
The last hard freeze (28°F) in Carroll County typically lands around Mar 16, 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 6.
How long is the growing season in Carroll County?
Measured between 28°F hard freezes, Carroll County sees about 246 frost-free days — roughly Mar 16 through Nov 17, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 6 to Nov 3, about 211 days.
Is the soil safe to grow vegetables in Carroll County?
The federal record around Carroll County is a meaningful one — 448 documented sites, mostly Underground Storage Tanks entries (323), the nearest Underground Storage Tanks record about 0.1 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.
Everything above is measured at Carroll County's scale — its 8a band and its 246-day season. Your yard writes its own version of Carroll County's numbers: we read soil, sun, drainage and frost at your exact address. Try it for 14 days — no card required.
Will It Grow Here?
Zone fit is the first question — each answer below reads Georgia's frost window, season length, and soil profile against the plant's real requirements.
What this page reads at Carroll County’s own scale
9 of the readings below were taken at Carroll County's own scale — its own ~246-day span between 28°F freezes, the 3 most extensive soil series mapped here and 448 documented sites inside its boundary; one is borrowed from a wider read, named and linked below.
Measured here
- Carroll County's own USDA hardiness band, zones 8aUSDA PHZM 2023
- Carroll County's own 28°F hard-freeze dates and its ~246-day span between themNOAA 1991–2020 Climate Normals
- The soil order, drainage, surface pH, and the 3 most extensive named soil series mapped in Carroll CountyUSDA NRCS SSURGO
- 448 documented contamination sites inside the county boundary, distance-sorted from its center — the closest Underground Storage Tanks record about 0.1 miles outFederal environmental registers
- Carroll County's boundary and the 319,434 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8a and a ~246-day seasonGrowable Ground crop-matching engine
- Carroll County sitting wholly inside the PiedmontUS EPA Level III Ecoregions
- Open occurrence records documented in Carroll County for a tracked speciesGBIF derived datasets (CC0 / CC BY 4.0)
- Which agricultural compounds go onto Carroll County farmland, and roughly how muchUSGS NAWQA EPest county estimates
Inherited from a wider read
- The growing challenges every Georgia grower plans around — written at state scale, so they stay on the state guidefrom Georgia
What this page can’t tell you
- How the season shifts across Carroll County — the ~246 days above is one reading at its centre; the 12 towns below each carry their owntowns in this county →
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Carroll County's 319,434 acreswhy one lot differs from the next →
- Which of those 448 documented sites actually reaches your soil — that needs your address, the wind, and the groundwater directionhow we read the record →
- Where cold air settles, which slopes face the sun, and which way the wind runs on your own ground — none of it survives being averaged over Carroll Countyread your own land →