Simpsonville, South Carolina, sits in USDA hardiness zone 8a — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
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 Simpsonville, 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 Simpsonville 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 Simpsonville — soil, climate, flood, and parcel records. How we handle your address.
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Simpsonville — the short answer
Simpsonville, South Carolina: USDA zone 8a, about 262 days between hard freezes, across 6K acres of city.
- USDA zone
- 8a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 11
- Greenville County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Nov 28
- Greenville County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~262
- Greenville County normal — NOAA 1991–2020, nearest to this town
- City area
- 6K 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 Greenville County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 8a is Simpsonville's average, not your lot's — a low corner or a tree line moves it. Against Simpsonville's 262-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Simpsonville
Each reading below is measured for Simpsonville itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsSimpsonville runs about 262 days between hard freezes (read from Greenville County, the closest normal to Simpsonville) — 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
MeasuredSimpsonville 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 Simpsonville is in
Simpsonville sits in the Piedmont — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Simpsonville's own centroid rather than borrowed from Greenville County.
What Grows in Simpsonville
Every plant below cleared Simpsonville's own zone 8a and its 262-day season. Each card opens that plant's South Carolina profile. How we score.
Is it too late to plant in Simpsonville?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Feb 11; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 11 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 28 — 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 Simpsonville
Closest first, within ~10 miles of Simpsonville. Listing isn't leaking, and distance isn't exposure.
- MIKE & JACK #3Underground Storage Tanks · 700 ft
- NAPA STORE-CHA796Brownfields · 750 ft
- CAROLINA CENTERS FOR ORAL AND FACIAL SURGERYBrownfields · 900 ft
- HOVIS PRECISION PRODUCTSUnderground Storage Tanks · 900 ft
- CVS PHARMACY 3805Brownfields · 1000 ft
- ADVANCE AUTO PARTS #5760Brownfields · 1100 ft
- MILLIKEN & CO HILLCREST PLTBrownfields · 1900 ft
- MILLIKEN & CO HILLCREST PLTToxics Release Inventory · 1900 ft
- SADISCO OF GREENVILLE INCUnderground Storage Tanks · 1900 ft
- ASHWORTH BROTHERS INCUnderground Storage Tanks · 1900 ft
- SAV WAYUnderground Storage Tanks · 2000 ft
- SOUTHERN CONVENIENCE 321Underground Storage Tanks · 2200 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Simpsonville'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 Simpsonville.
Sources Checked
within ~10 miles of Simpsonville
Severity Distribution
within ~10 miles of Simpsonville
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Simpsonville, Toxics Release Inventory runs higher than the national average — 125 sites within ~10 miles of Simpsonville. 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.
Check your specific parcel in Simpsonville
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 Simpsonville average
Your land is one point inside Simpsonville
Everything above resolves to Simpsonville as a whole — one PHZM band, read across 6K acres, with hard-freeze dates borrowed from Greenville County’s record because no 30-year normal resolves at this city’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 city 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 Simpsonville Average
Simpsonville Average
- ●USDA Zones 8a, averaged across Simpsonville
- ●One soil character for all of Simpsonville
- ●Frost dates read at Simpsonville's scale: Mar 11 to Nov 28
YOUR Parcel
- ✓Your exact zone, not Simpsonville's 8a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Simpsonville
Pull a site-specific report for your exact address in Simpsonville, South Carolina — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Simpsonville averages can't show:
We read public map data around Simpsonville — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Simpsonville average
How we know this about Simpsonville
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at this city’s own centroid; hard-freeze dates from NOAA 1991–2020 28°F normals at Greenville 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 city grain anywhere on this page — there is no city-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 Simpsonville
When does frost risk typically end in Simpsonville?
The last hard freeze (28°F) in Simpsonville typically lands around Mar 11, 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 1.
When is the first frost in Simpsonville?
The first hard freeze (28°F) in Simpsonville typically arrives around Nov 28, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 14, so the watching starts about Oct 29 — about 262 days after the spring freeze cleared.
How long is the growing season in Simpsonville?
Measured between 28°F hard freezes, Simpsonville sees about 262 frost-free days — roughly Mar 11 through Nov 28, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 1 to Nov 14, about 227 days.
Is the soil safe to grow vegetables in Simpsonville?
The federal record around Simpsonville runs heavier than most — 1,079 documented sites, mostly Underground Storage Tanks entries (495), the nearest Underground Storage Tanks record about 0.1 miles out — 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.
How do I protect my plants from frost in Simpsonville?
From about Oct 29 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 28 (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 28. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Simpsonville's scale — its 8a band and its 262-day season. Your yard writes its own version of Simpsonville'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 Simpsonville’s own scale
5 of the readings below were taken at Simpsonville's own scale — the 6,211 acres it covers and 1,079 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Simpsonville's own USDA hardiness band, zones 8aUSDA PHZM 2023
- 1,079 documented contamination sites on the federal record near Simpsonville, the closest Underground Storage Tanks record about 0.1 miles out from the town centreFederal environmental registers
- Simpsonville's boundary and the 6,211 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8a and a ~262-day seasonGrowable Ground crop-matching engine
- The ecoregion at Simpsonville's own centroid, the PiedmontUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Simpsonville has no normal of its own, so its county's is the closest measured readfrom Greenville County
- Soil character — no town-scale survey exists, so Simpsonville's 6,211 acres read through its county's SSURGO summaryfrom Greenville County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Greenville 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 Greenville County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Simpsonville's 6,211 acreswhy one lot differs from the next →
- Which side of Simpsonville you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 6,211 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks 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 Simpsonville-wide figureread your own land →