Williamston, South Carolina, 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.
Among the crops suited to this profile: cabbage, fig, california poppy, and collard greens. The site-level story — soil, sun, drainage — decides the rest.
Even in Williamston, 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 Williamston 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 Williamston — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Williamston — the short answer
Williamston, South Carolina: USDA zone 8a, about 264 days between hard freezes, across 2K acres of town.
- USDA zone
- 8a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 10
- Anderson County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Nov 29
- Anderson County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~264
- Anderson County normal — NOAA 1991–2020, nearest to this town
- Town area
- 2K acres
- US Census TIGER/Line 2025
Every figure names the dataset it came from. No 30-year normal resolves at this town’s own centroid, so the hard-freeze dates are Anderson County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 8a is Williamston's average, not your lot's — a low corner or a tree line moves it. Against Williamston's 264-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Williamston
Each reading below is measured for Williamston itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsWilliamston runs about 264 days between hard freezes (read from Anderson County, the closest normal to Williamston) — 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
MeasuredWilliamston 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 Williamston is in
Williamston sits in the Piedmont — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Williamston's own centroid rather than borrowed from Anderson County.
What Grows in Williamston
Every plant below cleared Williamston's own zone 8a and its 264-day season. Each card opens that plant's South Carolina profile. How we score.
Is it too late to plant in Williamston?
For most of the year, no — what changes is which crops still fit the days remaining. Cool-season crops can go in from around Feb 10; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 10 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 29 — 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.
What's on the federal record near Williamston
Closest first, within ~10 miles of Williamston. Listing isn't leaking, and distance isn't exposure.
- LITTLE GENERAL FOOD STORE 514Brownfields · 650 ft
- WILLIAMSTON TOWN OFUnderground Storage Tanks · 650 ft
- WOODY SIMMONS AUTO SERVICEUnderground Storage Tanks · 900 ft
- FAST FUEL 9Underground Storage Tanks · 900 ft
- SAMS TEXACOUnderground Storage Tanks · 900 ft
- FIRESTONE #0196901/D1601Underground Storage Tanks · 950 ft
- WILLIAMSTON OLD TOWN HALLUnderground Storage Tanks · 1200 ft
- MAIN ST GULFUnderground Storage Tanks · 1400 ft
- WILLIAMSTON HOME CENTER INCUnderground Storage Tanks · 1500 ft
- WALGREENS 17330Brownfields · 2100 ft
- SKIPPER LADDUnderground Storage Tanks · 2400 ft
- CUSHMAN PLANTUnderground Storage Tanks · 2600 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Williamston'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 Williamston.
Total Sites
405
within ~10 miles of Williamston
Risk Level
Elevated
Highest-severity
5 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Williamston
Severity Distribution
within ~10 miles of Williamston
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Williamston, two things run higher than the national average within ~10 miles of Williamston — PFAS (7 sites) and Toxics Release Inventory (44 sites). It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around 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 Williamston
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 Williamston average
Your land is one point inside Williamston
Everything above resolves to Williamston as a whole — one PHZM band, read across 2K acres, with hard-freeze dates borrowed from Anderson County’s record because no 30-year normal resolves at this town’s own centroid. 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 Williamston Average
Williamston Average
- ●USDA Zones 8a, averaged across Williamston
- ●One soil character for all of Williamston
- ●Frost dates read at Williamston's scale: Mar 10 to Nov 29
YOUR Parcel
- ✓Your exact zone, not Williamston's 8a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Williamston
Pull a site-specific report for your exact address in Williamston, South Carolina — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Williamston averages can't show:
We read public map data around Williamston — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Williamston average
How we know this about Williamston
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 Anderson County’s record, because none resolves here; 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 Williamston
When does frost risk typically end in Williamston?
The last hard freeze (28°F) in Williamston typically lands around Mar 10, 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 31.
When is the first frost in Williamston?
The first hard freeze (28°F) in Williamston typically arrives around Nov 29, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 15, so the watching starts about Oct 30 — about 264 days after the spring freeze cleared.
How long is the growing season in Williamston?
Measured between 28°F hard freezes, Williamston sees about 264 frost-free days — roughly Mar 10 through Nov 29, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Mar 31 to Nov 15, about 229 days.
Is the soil safe to grow vegetables in Williamston?
The federal record around Williamston is a meaningful one — 405 documented sites, mostly Underground Storage Tanks entries (234), the nearest Brownfields 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.
How do I protect my plants from frost in Williamston?
From about Oct 30 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 Nov 29 (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 Nov 29. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Williamston's scale — its 8a band and its 264-day season. Your yard writes its own version of Williamston'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 Williamston’s own scale
5 of the readings below were taken at Williamston's own scale — the 2,449 acres it covers and 405 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Williamston's own USDA hardiness band, zones 8aUSDA PHZM 2023
- 405 documented contamination sites on the federal record near Williamston, the closest Brownfields record about 0.1 miles out from the town centreFederal environmental registers
- Williamston's boundary and the 2,449 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8a and a ~264-day seasonGrowable Ground crop-matching engine
- The ecoregion at Williamston's own centroid, the PiedmontUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Williamston has no normal of its own, so its county's is the closest measured readfrom Anderson County
- Soil character — no town-scale survey exists, so Williamston's 2,449 acres read through its county's SSURGO summaryfrom Anderson County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Anderson County
- The growing challenges every South Carolina grower plans around — written at state scale, so they stay on the state guidefrom South Carolina
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Anderson County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Williamston's 2,449 acreswhy one lot differs from the next →
- Which side of Williamston you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 2,449 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields record about 0.1 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 Williamston-wide figureread your own land →