Hart County, in Georgia, sits in USDA hardiness zone 8a — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
On paper, cabbage, fig, california poppy, and collard greens all suit these conditions — on the ground, soil, sun, and drainage make the final call.
Hart 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
Hart County holds more than one microclimate.
Soils and elevations shift across Hart 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 Hart County — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Hart County — the short answer
Hart County, Georgia: USDA zone 8a, about 274 days between hard freezes, across 149K acres.
- USDA zone
- 8a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 4
- NOAA 1991–2020 Climate Normals, 28°F
- First hard freeze (28°F)
- Dec 3
- NOAA 1991–2020 Climate Normals, 28°F
- Days between freezes
- ~274
- NOAA 1991–2020 Climate Normals, 28°F
- County area
- 149K 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 Hart County's average, not your lot's — a low corner or a tree line moves it. Against Hart County's 274-day season, see what your own ground reads.
Heat and winter chill in Hart County
Across a year, Hart County accumulates about 4,685 growing degree days above 50°F, about 730 fewer than the middle Georgia county — ahead of 34 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 1,524 hours below 45°F, 388 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 Hart County
Across Hart County, the ground is predominantly Ultisols, where Madison, Cecil, and Appling are the most extensive named soil series. The soil is generally well drained with a sandy loam surface. Topsoil pH runs about 5.5, strongly acidic. Rainfall drains through hydrologic group B soils.
Soil order
Ultisols
Drainage
Well drained
Prime farmland
39%
Hydric soils
2%
Soil still varies lot by lot — soil types explained.
How the ground varies across Hart County
The USDA soil survey maps 83% of Hart County as well drained — but another 7% drains differently: 3% moderately well drained, 2% somewhat poorly drained.
Madison is the most extensive named soil at 49% of mapped acres, then Cecil (29%) and Appling (7%).
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 Hart County
Each reading below is measured for Hart 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 Hart 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 Hart County runs about pH 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
MeasuredHart County runs about 274 days between hard freezes — close to year-round growing.
Frost is rarely the limit here; winter plantings are as real as summer ones, and the harder question is which crops shrug off the summer heat.
Grow cool-season crops through the mild winter, and choose heat-tolerant varieties for the summer beds.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredHart 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 Hart County is in
Hart 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 Hart County
We scored all 1,086 plants against Hart County's own USDA zone 8a and its own 274-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 Hart County?
Too late for some crops, right on time for others — a growing season is a sequence, not a deadline. Cool-season crops can go in from around Feb 4; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 4 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Dec 3 — long-season crops need about 90 days of runway, quick greens only 30. And with a calendar this mild, the honest answer is that planting barely stops — winter opens seasons colder regions never see.
Documented around Hart County
- Japanese beetle4 documented records
Sighting records, so they follow observers as much as insects.
What gets applied to farmland in Hart County
USGS estimates 12,542 lb of 2,4-d on Hart County farmland in 2019, its largest by weight, ahead of Glyphosate (6,078 lb) and Triclopyr (2,011 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 Hart County — and how to grow with it.
We checked the federal record across Hart County — 141 documented sites across 6 of the 9 source types we track.
The most significant on record: 1 Superfund site (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 Hart 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 Hart County
Closest first, across Hart County. Listing isn't leaking, and distance isn't exposure.
- SAVANNAH VALLEY EGG CO INCUnderground Storage Tanks · 0.7 mi
- HARPER & JOHNSON ENTERPRISEUnderground Storage Tanks · 0.7 mi
- NESTLE PURINA PETCARE COToxics Release Inventory · 0.8 mi
- BRAKEBUSH HARTWELL, LLCToxics Release Inventory · 0.8 mi
- NORTHEAST GEORGIA TIRE RECYCLING INCUnderground Storage Tanks · 0.8 mi
- LIBERTY ACQUISITIONS 825 LLCToxics Release Inventory · 0.9 mi
- BYRUM GROCUnderground Storage Tanks · 0.9 mi
- TURNER CONCRETEUnderground Storage Tanks · 1.1 mi
- ARTHUR OGLESBYUnderground Storage Tanks · 1.1 mi
- MONROE AUTO EQUIPMENT/PARTSUnderground Storage Tanks · 1.1 mi
- MONROE AUTO EQUIPMENT COToxics Release Inventory · 1.2 mi
- MONROE AUTO EQUIPMENT COBrownfields · 1.2 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Hart 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 Hart County.
Total Sites
141
across Hart County
Risk Level
Elevated
Highest-severity
1 Superfund site (none NPL-listed)
Sources Checked
across Hart County
Severity Distribution
across Hart County
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Hart County, two things run higher than the national average across Hart County — Toxics Release Inventory (11 sites) and Underground Storage Tanks (108 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.
Underground Storage Tanks: Underground storage tanks are the single most common source of soil contamination near homes and gardens.
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Use raised beds with imported soil — this eliminates the primary soil-contact pathway.
Check your specific parcel in Hart 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 Hart County average
Your land is one point inside Hart County
Everything above resolves to Hart County as a whole — one PHZM band and one county frost record, read across 149K 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 Hart County Average
Hart County Average
- ●USDA Zones 8a, averaged across Hart County
- ●One soil character for all of Hart County
- ●Frost dates read at Hart County's scale: Mar 4 to Dec 3
YOUR Parcel
- ✓Your exact zone, not Hart County's 8a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your parcel in Hart County
Pull a site-specific report for your exact address in Hart County, Georgia — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Hart County averages can't show:
We read public map data around Hart County — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Hart County average
How we know this about Hart 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 Hart County carries no record of its own, the figure is inherited and labelled — the resolution ledger below names each.
Common questions about Hart County
When does frost risk typically end in Hart County?
The last hard freeze (28°F) in Hart County typically lands around Mar 4, 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 Mar 25.
How long is the growing season in Hart County?
Measured between 28°F hard freezes, Hart County sees about 274 frost-free days — roughly Mar 4 through Dec 3, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Mar 25 to Nov 19, about 239 days.
Is the soil safe to grow vegetables in Hart County?
The federal record around Hart County is a meaningful one — 141 documented sites, mostly Underground Storage Tanks entries (108), the nearest Underground Storage Tanks record about 0.7 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 Hart County's scale — its 8a band and its 274-day season. Your yard writes its own version of Hart 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 Hart County’s own scale
9 of the readings below were taken at Hart County's own scale — its own ~274-day span between 28°F freezes, the 3 most extensive soil series mapped here and 141 documented sites inside its boundary; one is borrowed from a wider read, named and linked below.
Measured here
- Hart County's own USDA hardiness band, zones 8aUSDA PHZM 2023
- Hart County's own 28°F hard-freeze dates and its ~274-day span between themNOAA 1991–2020 Climate Normals
- The soil order, drainage, surface pH, and the 3 most extensive named soil series mapped in Hart CountyUSDA NRCS SSURGO
- 141 documented contamination sites inside the county boundary, distance-sorted from its center — the closest Underground Storage Tanks record about 0.7 miles outFederal environmental registers
- Hart County's boundary and the 148,751 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8a and a ~274-day seasonGrowable Ground crop-matching engine
- Hart County sitting wholly inside the PiedmontUS EPA Level III Ecoregions
- Open occurrence records documented in Hart County for a tracked speciesGBIF derived datasets (CC0 / CC BY 4.0)
- Which agricultural compounds go onto Hart 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 Hart County — the ~274 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 Hart County's 148,751 acreswhy one lot differs from the next →
- Which of those 141 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 Hart Countyread your own land →