Oconee County, in South Carolina, sits in USDA hardiness zone 8a — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
Growers here do well with cabbage, fig, california poppy, and collard greens — with the usual caveat that any single yard's soil, sun, and drainage cast the deciding vote.
Oconee County lies within the Upstate South Carolina and the Piedmont — a regional growing area with its own character.
Grounded in USDA PHZM 2023 · Growable Ground suitability scoring · NOAA 1991–2020 Climate Normals
Oconee County holds more than one microclimate.
Soils and elevations shift across Oconee 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 Oconee County — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Oconee County — the short answer
Oconee County, South Carolina: USDA zone 8a, about 250 days between hard freezes, across 401K acres.
- USDA zone
- 8a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 14
- NOAA 1991–2020 Climate Normals, 28°F
- First hard freeze (28°F)
- Nov 19
- NOAA 1991–2020 Climate Normals, 28°F
- Days between freezes
- ~250
- NOAA 1991–2020 Climate Normals, 28°F
- County area
- 401K 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 Oconee County's average, not your lot's — a low corner or a tree line moves it. Against Oconee County's 250-day season, see what your own ground reads.
Heat and winter chill in Oconee County
Across a year, Oconee County accumulates about 4,574 growing degree days above 50°F, about 574 fewer than the middle South Carolina county — ahead of 2 of South Carolina’s 46 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 1,592 hours below 45°F, 230 more than the South Carolina middle of 1,362. 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 Oconee County
Across Oconee County, the ground is predominantly Ultisols, where Cecil, Pacolet, and Evard are the most extensive named soil series. The soil is generally well drained with a fine sandy loam surface. Topsoil pH runs about 5.3–5.5, strongly acidic. Rainfall drains through hydrologic group B soils.
Soil order
Ultisols
Drainage
Well drained
Prime farmland
7%
Hydric soils
0%
Soil still varies lot by lot — soil types explained.
How the ground varies across Oconee County
The USDA soil survey maps 91% of Oconee County as well drained — but another 2% drains differently: 2% moderately well drained.
Cecil is the most extensive named soil at 29% of mapped acres, then Pacolet (18%) and Evard (17%).
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 Oconee County
Each reading below is measured for Oconee 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 Oconee 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 Oconee County runs about pH 5.3–5.5, 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
MeasuredOconee County runs about 250 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
MeasuredOconee 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 Oconee County is in
Oconee County spans 2 EPA Level III ecoregions — Piedmont (69%) and Blue Ridge (32%). Which one your land falls in changes what grows wild there and how the ground behaves, and a county-wide answer cannot tell you which.
What Grows in Oconee County
We scored all 1,086 plants against Oconee County's own USDA zone 8a and its own 250-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 South Carolina profile.
Is it too late to plant in Oconee County?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Feb 14; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 14 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 19 — long-season crops need about 90 days of runway, quick greens only 30. There is slack in a calendar like this — late plantings, second rounds of favorites, and a fall bench that keeps beds working.
Documented around Oconee County
Survey cells within 31 miles of Oconee County checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 34 miles off. What to watch for.
- monarch butterfly1 documented records
Sighting records, so they follow observers as much as insects.
What gets applied to farmland in Oconee County
USGS estimates 7,720 lb of 2,4-d on Oconee County farmland in 2019, its largest by weight, ahead of Glyphosate (5,413 lb) and Atrazine (3,254 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 Oconee County — and how to grow with it.
We checked the federal record across Oconee County — 415 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 Oconee 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 Oconee County
Closest first, across Oconee County. Listing isn't leaking, and distance isn't exposure.
- DONNIE PARTINS USED CARSUnderground Storage Tanks · 0.6 mi
- AVONDALE MILLS WALHALLA PLANTBrownfields · 0.8 mi
- LINDSAY OIL CO INCUnderground Storage Tanks · 0.9 mi
- LINLEY LUMBER CO INCUnderground Storage Tanks · 0.9 mi
- NASON COMPANYBrownfields · 0.9 mi
- MUDRA CORPORATIONUnderground Storage Tanks · 1.0 mi
- VALENITE INC #2Toxics Release Inventory · 1.0 mi
- EDWARDS AUTO SALES CO INCORPORATEDBrownfields · 1.0 mi
- STOP & SHOPUnderground Storage Tanks · 1.0 mi
- FAMILY DOLLAR 4312Brownfields · 1.0 mi
- CVS PHARMACY 3891Brownfields · 1.0 mi
- STILES ROCHESTERUnderground Storage Tanks · 1.0 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Oconee 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 Oconee County.
Total Sites
415
across Oconee County
Risk Level
Elevated
Highest-severity
1 Superfund site (none NPL-listed)
Sources Checked
across Oconee County
Severity Distribution
across Oconee County
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Oconee County, two things run higher than the national average across Oconee County — PFAS (5 sites) and Toxics Release Inventory (33 sites). 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.
Toxics Release Inventory: TRI facilities report annual chemical releases to air, water, and land.
Test irrigation water source — this is the primary pathway for PFAS to reach garden crops.
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Check your specific parcel in Oconee 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 Oconee County average
Your land is one point inside Oconee County
Everything above resolves to Oconee County as a whole — one PHZM band and one county frost record, read across 401K 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 Oconee County Average
Oconee County Average
- ●USDA Zones 8a, averaged across Oconee County
- ●One soil character for all of Oconee County
- ●Frost dates read at Oconee County's scale: Mar 14 to Nov 19
YOUR Parcel
- ✓Your exact zone, not Oconee County's 8a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your parcel in Oconee County
Pull a site-specific report for your exact address in Oconee County, South Carolina — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Oconee County averages can't show:
We read public map data around Oconee County — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Oconee County average
How we know this about Oconee 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 Oconee County carries no record of its own, the figure is inherited and labelled — the resolution ledger below names each.
Common questions about Oconee County
When does frost risk typically end in Oconee County?
The last hard freeze (28°F) in Oconee County typically lands around Mar 14, 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 4.
How long is the growing season in Oconee County?
Measured between 28°F hard freezes, Oconee County sees about 250 frost-free days — roughly Mar 14 through Nov 19, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 4 to Nov 5, about 215 days.
Is the soil safe to grow vegetables in Oconee County?
The federal record around Oconee County is a meaningful one — 415 documented sites, mostly Underground Storage Tanks entries (275), the nearest Underground Storage Tanks record about 0.6 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 Oconee County's scale — its 8a band and its 250-day season. Your yard writes its own version of Oconee 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 South Carolina's frost window, season length, and soil profile against the plant's real requirements.
What this page reads at Oconee County’s own scale
9 of the readings below were taken at Oconee County's own scale — its own ~250-day span between 28°F freezes, the 3 most extensive soil series mapped here and 415 documented sites inside its boundary; one is borrowed from a wider read, named and linked below.
Measured here
- Oconee County's own USDA hardiness band, zones 8aUSDA PHZM 2023
- Oconee County's own 28°F hard-freeze dates and its ~250-day span between themNOAA 1991–2020 Climate Normals
- The soil order, drainage, surface pH, and the 3 most extensive named soil series mapped in Oconee CountyUSDA NRCS SSURGO
- 415 documented contamination sites inside the county boundary, distance-sorted from its center — the closest Underground Storage Tanks record about 0.6 miles outFederal environmental registers
- Oconee County's boundary and the 401,019 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8a and a ~250-day seasonGrowable Ground crop-matching engine
- The 2 ecoregions Oconee County spans, Piedmont the largestUS EPA Level III Ecoregions
- Open occurrence records documented in Oconee County for a tracked speciesGBIF derived datasets (CC0 / CC BY 4.0)
- Which agricultural compounds go onto Oconee County farmland, and roughly how muchUSGS NAWQA EPest county estimates
Inherited from a wider read
- The growing challenges every South Carolina grower plans around — written at state scale, so they stay on the state guidefrom South Carolina
What this page can’t tell you
- How the season shifts across Oconee County — the ~250 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 Oconee County's 401,019 acreswhy one lot differs from the next →
- Which of those 415 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 Oconee Countyread your own land →