Dillon, South Carolina, sits in USDA hardiness zone 8b — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
Well-matched crops include cabbage, fig, california poppy, and collard greens, and the gap between "grows in the area" and "grows in your yard" is closed by soil, sun, and drainage.
Even in Dillon, 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 Dillon 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 Dillon — soil, climate, flood, and parcel records. How we handle your address.
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Dillon — the short answer
Dillon, South Carolina: USDA zone 8b, about 267 days between hard freezes, across 3K acres of city.
- USDA zone
- 8b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 5
- Dillon County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Nov 27
- Dillon County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~267
- Dillon County normal — NOAA 1991–2020, nearest to this town
- City area
- 3K 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 Dillon County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 8b is Dillon's average, not your lot's — a low corner or a tree line moves it. Against Dillon's 267-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Dillon
Each reading below is measured for Dillon itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsDillon runs about 267 days between hard freezes (read from Dillon County, the closest normal to Dillon) — 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
MeasuredDillon 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 Dillon is in
Dillon sits in the Southeastern Plains — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Dillon's own centroid rather than borrowed from Dillon County.
What Grows in Dillon
Every plant below cleared Dillon's own zone 8b and its 267-day season. Each card opens that plant's South Carolina profile. How we score.
Is it too late to plant in Dillon?
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 5; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 5 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 27 — long-season crops need about 90 days of runway, quick greens only 30. With almost year-round growing weather, timing is about heat and rainfall more than frost — some bench is always in play.
Documented around Dillon
Survey cells within 31 miles of Dillon checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 86 miles off. What to watch for.
What's on the federal record near Dillon
Closest first, within ~10 miles of Dillon. Listing isn't leaking, and distance isn't exposure.
- STONEWALL JACKSON ESTATEUnderground Storage Tanks · 550 ft
- CARR STORAGEUnderground Storage Tanks · 600 ft
- SC690Underground Storage Tanks · 650 ft
- ED F HODGES INC STATION 4Underground Storage Tanks · 650 ft
- BREAKERS 117Underground Storage Tanks · 750 ft
- DIL- 8Nitrate · 750 ft
- DILLON AMOCOUnderground Storage Tanks · 800 ft
- ROWND & SONS, INC.Superfund · 850 ft
- DILLON TIGER MARTUnderground Storage Tanks · 1100 ft
- COWARDS SERVICE CENTERUnderground Storage Tanks · 1200 ft
- SAINT EUGENE COMMUNITY HOSPITALBrownfields · 1200 ft
- MCLEOD MEDICAL CENTER DILLONUnderground Storage Tanks · 1300 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Dillon'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 Dillon.
Total Sites
215
within ~10 miles of Dillon
Risk Level
Elevated
Highest-severity
3 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Dillon
Severity Distribution
within ~10 miles of Dillon
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Dillon, two things run higher than the national average within ~10 miles of Dillon — Underground Storage Tanks (163 sites) and Superfund (3 sites). It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
Underground Storage Tanks: Underground storage tanks are the single most common source of soil contamination near homes and gardens.
Superfund: Superfund sites represent the most severe contamination in the federal system.
Use raised beds with imported soil — this eliminates the primary soil-contact pathway.
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Check your specific parcel in Dillon
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 Dillon average
Your land is one point inside Dillon
Everything above resolves to Dillon as a whole — one PHZM band, read across 3K acres, with hard-freeze dates borrowed from Dillon 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 Dillon Average
Dillon Average
- ●USDA Zones 8b, averaged across Dillon
- ●One soil character for all of Dillon
- ●Frost dates read at Dillon's scale: Mar 5 to Nov 27
YOUR Parcel
- ✓Your exact zone, not Dillon's 8b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Dillon
Pull a site-specific report for your exact address in Dillon, South Carolina — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Dillon averages can't show:
We read public map data around Dillon — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Dillon average
How we know this about Dillon
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 Dillon 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 Dillon
When does frost risk typically end in Dillon?
The last hard freeze (28°F) in Dillon typically lands around Mar 5, 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 26.
When is the first frost in Dillon?
The first hard freeze (28°F) in Dillon typically arrives around Nov 27, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 13, so the watching starts about Oct 28 — about 267 days after the spring freeze cleared.
How long is the growing season in Dillon?
Measured between 28°F hard freezes, Dillon sees about 267 frost-free days — roughly Mar 5 through Nov 27, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Mar 26 to Nov 13, about 232 days.
Is the soil safe to grow vegetables in Dillon?
The federal record around Dillon is a meaningful one — 215 documented sites, mostly Underground Storage Tanks entries (163), the nearest Underground Storage Tanks 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 Dillon?
From about Oct 28 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 27 (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 27. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Dillon's scale — its 8b band and its 267-day season. Your yard writes its own version of Dillon'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 Dillon’s own scale
6 of the readings below were taken at Dillon's own scale — the 3,398 acres it covers and 215 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Dillon's own USDA hardiness band, zones 8bUSDA PHZM 2023
- 215 documented contamination sites on the federal record near Dillon, the closest Underground Storage Tanks record about 0.1 miles out from the town centreFederal environmental registers
- Dillon's boundary and the 3,398 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8b and a ~267-day seasonGrowable Ground crop-matching engine
- The ecoregion at Dillon's own centroid, the Southeastern PlainsUS EPA Level III Ecoregions
- Lanternfly survey cells around Dillon checked, none carrying a detectionlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- The 28°F hard-freeze dates — Dillon has no normal of its own, so its county's is the closest measured readfrom Dillon County
- Soil character — no town-scale survey exists, so Dillon's 3,398 acres read through its county's SSURGO summaryfrom Dillon County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Dillon 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 Dillon County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Dillon's 3,398 acreswhy one lot differs from the next →
- Which side of Dillon you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 3,398 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 Dillon-wide figureread your own land →
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