South Carolina spans USDA hardiness zones 7a-9b, with a growing season of about 265 frost-free days — growing weather most of the year, with mild winters opening seasons colder regions never see.
What the season actually delivers comes down to 45-55 inches of annual rainfall, a median of roughly 5,233 growing-degree days (base 50°F), and about 1,278 winter chill hours for tree fruit. On the soil map, red clay (Piedmont), sandy loam (Coastal), alluvial, and loam dominate — and drainage is the trait that separates an easy bed from a project. Growing in South Carolina really means growing in one of its distinct regions — Piedmont, Tidewater & Chesapeake, and Carolina Sandhills — each with its own zone band and frost rhythm. These conditions suit peach, okra, muscadine grape, and palmetto — a starting list any specific site will trim or extend with its own soil, sun, and drainage.
Grounded inUSDA PHZM•NOAA Climate Normals•USDA NRCS SSURGO•GDD (PRISM 1991-2020 normals)•Chill hours (PRISM 1991-2020 normals)•USDA hardiness sub-region map•EPA FRS•USDA PLANTS•Growable Ground suitability scoring
South Carolina spans zones 7a-9b, but your yard sits in exactly one — and slope, tree cover, and low spots nudge it further. 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 South Carolina — soil, climate, flood, and parcel records. How we handle your address.
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Distinct growing regions within South Carolina — each has its own zones, soils, and signature crops.
South Carolina: USDA zones 7a-9b, 237–320 frost-free days depending on the county, 46 counties.
The middle half of this state’s counties. Tender transplants usually wait 2–3 weeks past the last hard freeze. The shortest-season figure is South Carolina's own county record — Chester County's measured 28°F normal, not a modeled floor.
Zone 7a-9b is South Carolina's average, not your lot's — a low corner or a tree line moves it. Against South Carolina's 265-day season, see what your own ground reads.
One answer for South Carolina averages 46 counties whose growing seasons are 83 days apart — from 237 frost-free days in Chester County to 320 in Charleston County. That is the same state, measured the same way, in the same years. Which end of it your county sits nearer decides what finishes before the first hard freeze.
The middle half of 46 counties runs 256–277 days, with a median of 264 days — a 83-day span end to end.
Measured across 46 counties, each carrying its own 28°F normal. NOAA Regional Climate Centers ACIS, 1991-2020, county 28°F killing freeze. A county with no record of its own is absent from the range rather than counted as zero — nothing here is interpolated to the state. Your own site sits somewhere inside this range; a parcel report resolves where.
The middle half of South Carolina runs 256–277 frost-free days, and 22 of its 46 counties sit outside that — 11 on the short side, 11 on the long. A statewide planting date describes the middle well and the ends poorly, which is worth knowing before you follow one.
Under 256 frost-free days
11 counties
3 of 11 shown
The end of the state that sets the planting calendar — start seed indoors here and the season stretches to meet the crop.
256–277 frost-free days
24 counties
0 of 24 shown
The middle half of the state, and the part a single statewide date describes well.
Over 277 frost-free days
11 counties
3 of 11 shown
Long enough for a second succession of a quick crop after the first comes out.
Each county is placed by its own 28°F frost-free normal (NOAA Regional Climate Centers ACIS, 1991-2020, county 28°F killing freeze), the same figure its own guide page publishes. Elevation, slope and cold-air drainage move a yard within its county as well — which is the part only your address resolves.
The soil types that dominate South Carolina — how each drains decides more about crop success than almost anything else. Tap any soil to learn what it is and how to work with it. Each photo is a representative profile of that soil type; the named series is where it was documented, which is often another state.
Drainage
Slow. Red clay seals under pounding rain and sheds water across the surface, then holds tight to what soaks in.
What thrives
Okra, southern peas, sweet potatoes, and muscadines are traditional red-clay performers, and many fruit trees root deep into it once through the first year. Azaleas and blueberries appreciate its typical acidity.
Drainage
Fast. The sand fraction opens the soil up, so water moves through the root zone quickly and the surface rarely stays soggy. The trade is that nutrients ride out with the water.
What thrives
Root crops love it — carrots, potatoes, radishes, and onions size up cleanly in ground they can push through. Melons, sweet potatoes, asparagus, and most herbs appreciate the warmth and the drainage.
Drainage
Usually good: rivers sort their loads, and most alluvial soils have enough sand and silt to move water while holding plenty for roots. Low-lying pockets can run wet.
What thrives
Nearly everything — vegetables, orchards, vines, and berries all prosper on alluvium. Its depth lets roots go as far down as they care to.
Drainage
Balanced. The sand fraction keeps water moving, the clay fraction holds enough back for roots to drink between rains. After a heavy storm, loam typically clears the root zone within a day.
What thrives
Nearly everything in the vegetable garden — tomatoes, peppers, beans, squash, brassicas — plus most fruit trees, berries, and herbs. Loam gives you the widest plant palette of any texture.
Soil data: USDA NRCS SSURGO · Soil types explained
Plants well-suited to South Carolina's climate, soils, and growing season — each links to its full growing profile.
Usually not — gardeners here simply switch what goes in the ground as the season moves. Across South Carolina, cool-season planting typically opens about four weeks before the local last hard freeze — county medians put that freeze near Mar 9, with the middle half of counties between Feb 27 and Mar 12 (NOAA 1991–2020 climate normals). Tender transplants wait two to three weeks past it, and fall planting counts back from first freezes mostly between Nov 23 and Dec 1 — long-season crops need about 90 days of runway, quick greens only 30. Here the calendar nearly circles: cool-season crops take the winter shift, and the next window is always close.
The plants South Carolina put its name on — cultural emblems, not growing recommendations.
Gelsemium sempervirens
Designated 1924. In our plant library — see its full growing profile.
Sabal palm
Sabal palmetto
Designated 1939.
Designated 2011. In our plant library — see its full growing profile.
Plants the USDA PLANTS Database documents as native and present in South Carolina — a real per-state range, not just a zone match. Ordered by how closely each plant’s published hardiness range matches South Carolina’s zones 7a-9b, so this is a shortlist by climate fit, not a ranking of which plants matter most here. Presence is statewide, so a plant may still be uncommon in your specific county; your state’s Cooperative Extension or a native-plant society is the local authority.
US-native plants whose hardiness range overlaps South Carolina’s USDA zones 7a-9b but which USDA PLANTS doesn’t map to a single state range here. Zone overlap is a starting filter, not a range map.
What an experienced grower plans around here — each one has a move.
Red Piedmont clay requires amendment for drainage
Compost opens red clay over time; a raised bed opens it today — both together is the Piedmont standard.
High heat and humidity promote diseases
Wide spacing, morning base-watering, and resistant varieties keep the humid summer honest — extension keeps the lists.
Hurricane risk along the coast
Coastal beds favor wind-tough perennials and well-staked young trees before the storm season.
For cultivar selection, pest pressure, and planting-time guidance specific to South Carolina, the Clemson Cooperative Extension is the authoritative local source.
Safe to Grow Here?What the federal record shows across South Carolina — and how to grow with it.
We checked the federal record across South Carolina — 24,910 documented sites across 7 of the 9 source types we track.
The most significant on record: 256 Superfund sites. Sites tracked in EPA's Superfund program — from assessment-stage CERCLIS entries to confirmed National Priorities List cleanup sites.
South Carolina carries one of the heavier federal records we track — and that's not a verdict on your yard. Proximity to a documented site is information, not a diagnosis: nothing here says any particular parcel is affected. It does earn one concrete step — before food beds go in the ground, a professional soil test tells you exactly what you're working with, and raised beds with clean imported soil grow well almost anywhere in the meantime.
Sources Checked
across South Carolina
Severity Distribution
across South Carolina
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around South Carolina, Toxics Release Inventory runs higher than the national average — 1,600 sites across South Carolina. 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.
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Sources: EPA, USGS — 1.8M documented sites tracked nationwide across 9 federal source types.
Everything above resolves to South Carolina as a whole — a state whose own counties record seasons 83 days apart, and hardiness across zones 7a-9b. Your parcel sits at one point in that range, not in the middle of it. 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 state 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 statewide average.
State averages sketch the shape. Your soil, sun exposure, drainage, and microclimate decide what actually takes. Pull a site-specific report for your exact parcel.
Enter your address. We read your soil, sun, drainage, and frost dates, then score 1,086 plants against the real conditions on your land.
Three things about your lot that South Carolina averages can't show:
We read public map data around South Carolina — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the South Carolina average
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read per county and aggregated to the state band; the growing season from NOAA Regional Climate Centers ACIS 1991–2020 28°F normals, read at each county’s own record; rainfall from NOAA Climate Normals; soils from USDA NRCS SSURGO; boundaries from US Census TIGER/Line 2025; the contamination record from the federal sources named in that beat above. Where a county carries no record of its own, it is absent from the figure rather than filled in.
South Carolina spans USDA hardiness zones 7a-9b — which is to say winter's coldest night runs from about 0°F to 30°F depending where in South Carolina you are, averaged over 1991–2020 (USDA PHZM 2023).
Usually not — gardeners here simply switch what goes in the ground as the season moves. Across South Carolina, cool-season planting typically opens about four weeks before the local last hard freeze — county medians put that freeze near Mar 9, with the middle half of counties between Feb 27 and Mar 12 (NOAA 1991–2020 climate normals). Tender transplants wait two to three weeks past it, and fall planting counts back from first freezes mostly between Nov 23 and Dec 1 — long-season crops need about 90 days of runway, quick greens only 30. Here the calendar nearly circles: cool-season crops take the winter shift, and the next window is always close.
Across South Carolina, the middle half of counties see their last hard freeze (28°F) between about Feb 27 and Mar 12, with a county median near Mar 9 (NOAA 1991–2020 climate normals). 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 30.
Measured between 28°F hard freezes, growing seasons across South Carolina's counties mostly run about 256 to 277 days, with a county median near 265 (NOAA 1991–2020 climate normals). Tender crops get a somewhat shorter practical window, since lighter frosts reach a few weeks past the hard-freeze dates on both ends.
South Carolina's zones 7a-9b support a wide range — strong performers include Peach, Okra, Muscadine Grape, Palmetto, and Fig. What actually takes on any one site comes down to its soil, sun, and drainage, and we score each plant against the real conditions at your address.
Officially, South Carolina spans USDA zones 7a-9b (USDA PHZM 2023) — but a zone is a 30-year average of winter's coldest night across an area, and it can't see any one yard. A south-facing slope, a tree line, or a low frost pocket can shift a single site by half a zone either way, which is why neighboring gardeners often quote different numbers. We read the conditions at your exact address — soil, sun, slope, and frost — and score 1,086 plants against what's actually there.
The federal record across South Carolina runs heavier than most — 24,910 documented sites, mostly Underground Storage Tanks entries (15,287) — so test the soil before planting food in the ground, and raised beds with clean imported soil grow well in the meantime. Even here, proximity to a documented site is information, not a diagnosis of any one yard; the contamination map shows exactly what's recorded and where.
Start with three facts. South Carolina spans USDA zones 7a-9b, which sets what survives winter; last hard freezes range from about Feb 27 to Mar 12 across its counties (NOAA 1991–2020 climate normals); and 24,910 documented sites sit on the federal record here, so a soil test before food beds is the smart first step. From there, matching plants to your actual soil and sun is the fun part.
Everything above is measured at South Carolina's scale — its 7a-9b band and its 265-day season. Your yard writes its own version of South Carolina's numbers: we read soil, sun, drainage and frost at your exact address. Try it for 14 days — no card required.
6 of the readings below were taken at South Carolina's own scale — the full zone 7a-9b span inside its borders, the 4 soil types that dominate its ground and 24,910 documented sites on its federal record; anything it cannot resolve at this scale is named below.
Measured here
What this page can’t tell you
Explore growing conditions by county — each has its own zone range and land area.
Explore growing conditions by city or town in South Carolina.
