White Knoll, South Carolina, sits in USDA hardiness zone 8b — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
The conditions favor cabbage, fig, california poppy, and collard greens, among others — though every individual site edits that list with its own soil, sun, and drainage.
Even in White Knoll, 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 White Knoll 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 White Knoll — soil, climate, flood, and parcel records. How we handle your address.
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White Knoll — the short answer
White Knoll, South Carolina: USDA zone 8b, about 265 days between hard freezes, across 4K acres of town.
- USDA zone
- 8b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 6
- Lexington County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Nov 26
- Lexington County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~265
- Lexington County normal — NOAA 1991–2020, nearest to this town
- Town area
- 4K 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 Lexington County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 8b is White Knoll's average, not your lot's — a low corner or a tree line moves it. Against White Knoll's 265-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in White Knoll
Each reading below is measured for White Knoll itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsWhite Knoll runs about 265 days between hard freezes (read from Lexington County, the closest normal to White Knoll) — 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
MeasuredWhite Knoll sits in USDA hardiness zone 8b.
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 White Knoll is in
White Knoll sits in the Southeastern Plains — EPA Level III, inside the wider Eastern Temperate Forests. That is read at White Knoll's own centroid rather than borrowed from Lexington County.
What Grows in White Knoll
Every plant below cleared White Knoll's own zone 8b and its 265-day season. Each card opens that plant's South Carolina profile. How we score.
Is it too late to plant in White Knoll?
Rarely: the season closes in stages, not all at once, and each stage has its crops. Cool-season crops can go in from around Feb 6; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 6 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 26 — 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 White Knoll
Survey cells within 31 miles of White Knoll checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 113 miles off. What to watch for.
What's on the federal record near White Knoll
Closest first, within ~10 miles of White Knoll. Listing isn't leaking, and distance isn't exposure.
- ECOFLO INC - WHITE KNOLL HIGH SCHOOLBrownfields · 1.1 mi
- LOWES OF S.E. LEXINGTON COUNTY #2967Brownfields · 1.2 mi
- LEXINGTON FAMILY PRACTICE- WHITE KNOLLBrownfields · 1.3 mi
- LEXINGTON WOMEN'S CARE- WHITE KNOLLBrownfields · 1.3 mi
- PITT STOP 56Underground Storage Tanks · 1.3 mi
- CORNER PANTRY 130Underground Storage Tanks · 1.4 mi
- PUBLIX SUPERMARKET 1637 PUBLIX AT LAKE CROSSINGBrownfields · 1.5 mi
- GRIFFINS AUTO PAINT & BODYBrownfields · 1.5 mi
- NATIONAL TIRE & BATTERY #8467Brownfields · 1.6 mi
- SALLY BEAUTY SUPPLY #10127Brownfields · 1.6 mi
- WALMART SUPERCENTER STORE 4521Brownfields · 1.6 mi
- WILD SMILES CHILDREN'S DENTISTRY - WHITE KNOLLBrownfields · 1.6 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from White Knoll'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 White Knoll.
Sources Checked
within ~10 miles of White Knoll
Severity Distribution
within ~10 miles of White Knoll
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around White Knoll, two things run higher than the national average within ~10 miles of White Knoll — PFAS (7 sites) and Toxics Release Inventory (47 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 White Knoll
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 White Knoll average
Your land is one point inside White Knoll
Everything above resolves to White Knoll as a whole — one PHZM band, read across 4K acres, with hard-freeze dates borrowed from Lexington 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 White Knoll Average
White Knoll Average
- ●USDA Zones 8b, averaged across White Knoll
- ●One soil character for all of White Knoll
- ●Frost dates read at White Knoll's scale: Mar 6 to Nov 26
YOUR Parcel
- ✓Your exact zone, not White Knoll's 8b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in White Knoll
Pull a site-specific report for your exact address in White Knoll, South Carolina — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that White Knoll averages can't show:
We read public map data around White Knoll — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the White Knoll average
How we know this about White Knoll
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 Lexington 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 White Knoll
When does frost risk typically end in White Knoll?
The last hard freeze (28°F) in White Knoll typically lands around Mar 6, 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 27.
When is the first frost in White Knoll?
The first hard freeze (28°F) in White Knoll typically arrives around Nov 26, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 12, so the watching starts about Oct 27 — about 265 days after the spring freeze cleared.
How long is the growing season in White Knoll?
Measured between 28°F hard freezes, White Knoll sees about 265 frost-free days — roughly Mar 6 through Nov 26, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Mar 27 to Nov 12, about 230 days.
Is the soil safe to grow vegetables in White Knoll?
The federal record around White Knoll is a meaningful one — 644 documented sites, mostly Underground Storage Tanks entries (356), the nearest Brownfields record about 1.1 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 White Knoll?
From about Oct 27 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 26 (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 26. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at White Knoll's scale — its 8b band and its 265-day season. Your yard writes its own version of White Knoll'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 White Knoll’s own scale
6 of the readings below were taken at White Knoll's own scale — the 3,916 acres it covers and 644 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- White Knoll's own USDA hardiness band, zones 8bUSDA PHZM 2023
- 644 documented contamination sites on the federal record near White Knoll, the closest Brownfields record about 1.1 miles out from the town centreFederal environmental registers
- White Knoll's boundary and the 3,916 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8b and a ~265-day seasonGrowable Ground crop-matching engine
- The ecoregion at White Knoll's own centroid, the Southeastern PlainsUS EPA Level III Ecoregions
- Lanternfly survey cells around White Knoll checked, none carrying a detectionlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- The 28°F hard-freeze dates — White Knoll has no normal of its own, so its county's is the closest measured readfrom Lexington County
- Soil character — no town-scale survey exists, so White Knoll's 3,916 acres read through its county's SSURGO summaryfrom Lexington County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Lexington 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 Lexington County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among White Knoll's 3,916 acreswhy one lot differs from the next →
- Which side of White Knoll you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 3,916 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields record about 1.1 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 White Knoll-wide figureread your own land →
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