Erwin, North Carolina, sits in USDA hardiness zone 8a — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
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 Erwin, 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 Erwin 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 Erwin — soil, climate, flood, and parcel records. How we handle your address.
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Erwin — the short answer
Erwin, North Carolina: USDA zone 8a, about 253 days between hard freezes, across 3K acres of town.
- USDA zone
- 8a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 12
- Harnett County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Nov 20
- Harnett County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~253
- Harnett County normal — NOAA 1991–2020, nearest to this town
- Town 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 Harnett County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 8a is Erwin's average, not your lot's — a low corner or a tree line moves it. Against Erwin's 253-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Erwin
Each reading below is measured for Erwin itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsErwin runs about 253 days between hard freezes (read from Harnett County, the closest normal to Erwin) — a long growing season.
There is slack for succession plantings and slow-finishing crops: many vegetables can be sown twice, and the heat-lovers have time to ripen fully.
Plan a second sowing of quick crops after the first comes out, and use the fall window most gardeners let sit idle.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredErwin 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 Erwin is in
Erwin sits in the Southeastern Plains — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Erwin's own centroid rather than borrowed from Harnett County.
What Grows in Erwin
Every plant below cleared Erwin's own zone 8a and its 253-day season. Each card opens that plant's North Carolina profile. How we score.
Is it too late to plant in Erwin?
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 12; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 12 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 20 — long-season crops need about 90 days of runway, quick greens only 30. There is slack in a calendar like this — late plantings, second rounds of favorites, and a fall bench that keeps beds working.
Documented around Erwin
Survey cells within 31 miles of Erwin checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 37 miles off. What to watch for.
What's on the federal record near Erwin
Closest first, within ~10 miles of Erwin. Listing isn't leaking, and distance isn't exposure.
- CARLIE C'S IGA 885Underground Storage Tanks · 1100 ft
- LUCKY STOP-ERWINUnderground Storage Tanks · 1200 ft
- ERWIN MARTUnderground Storage Tanks · 1800 ft
- ERIC JRS HAND CAR WASH AND DETAILUnderground Storage Tanks · 1900 ft
- J STREET SITESuperfund · 1900 ft
- SERVICE CLEANERSBrownfields · 2100 ft
- LARRY'S SUNOCOUnderground Storage Tanks · 2200 ft
- CHASE ENVIRONMENTAL INCBrownfields · 0.5 mi
- SWIFT TEXTILES INCToxics Release Inventory · 0.6 mi
- SWIFT TEXTILES INC.Underground Storage Tanks · 0.6 mi
- SHORT STOP 50Underground Storage Tanks · 0.6 mi
- STEWART 66 SERVICE STATIONUnderground Storage Tanks · 0.6 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Erwin'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 Erwin.
Total Sites
325
within ~10 miles of Erwin
Risk Level
Elevated
Highest-severity
3 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Erwin
Severity Distribution
within ~10 miles of Erwin
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Erwin, Underground Storage Tanks runs higher than the national average — 228 sites within ~10 miles of Erwin. 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.
Use raised beds with imported soil — this eliminates the primary soil-contact pathway.
Check your specific parcel in Erwin
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 Erwin average
Your land is one point inside Erwin
Everything above resolves to Erwin as a whole — one PHZM band, read across 3K acres, with hard-freeze dates borrowed from Harnett 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 Erwin Average
Erwin Average
- ●USDA Zones 8a, averaged across Erwin
- ●One soil character for all of Erwin
- ●Frost dates read at Erwin's scale: Mar 12 to Nov 20
YOUR Parcel
- ✓Your exact zone, not Erwin's 8a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Erwin
Pull a site-specific report for your exact address in Erwin, North Carolina — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Erwin averages can't show:
We read public map data around Erwin — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Erwin average
How we know this about Erwin
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 Harnett 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 Erwin
When does frost risk typically end in Erwin?
The last hard freeze (28°F) in Erwin typically lands around Mar 12, 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 2.
When is the first frost in Erwin?
The first hard freeze (28°F) in Erwin typically arrives around Nov 20, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 6, so the watching starts about Oct 21 — about 253 days after the spring freeze cleared.
How long is the growing season in Erwin?
Measured between 28°F hard freezes, Erwin sees about 253 frost-free days — roughly Mar 12 through Nov 20, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 2 to Nov 6, about 218 days.
Is the soil safe to grow vegetables in Erwin?
The federal record around Erwin is a meaningful one — 325 documented sites, mostly Underground Storage Tanks entries (228), the nearest Underground Storage Tanks record about 0.2 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 Erwin?
From about Oct 21 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 20 (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 20. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Erwin's scale — its 8a band and its 253-day season. Your yard writes its own version of Erwin'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 Erwin’s own scale
6 of the readings below were taken at Erwin's own scale — the 2,755 acres it covers and 325 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Erwin's own USDA hardiness band, zones 8aUSDA PHZM 2023
- 325 documented contamination sites on the federal record near Erwin, the closest Underground Storage Tanks record about 0.2 miles out from the town centreFederal environmental registers
- Erwin's boundary and the 2,755 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8a and a ~253-day seasonGrowable Ground crop-matching engine
- The ecoregion at Erwin's own centroid, the Southeastern PlainsUS EPA Level III Ecoregions
- Lanternfly survey cells around Erwin checked, none carrying a detectionlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- The 28°F hard-freeze dates — Erwin has no normal of its own, so its county's is the closest measured readfrom Harnett County
- Soil character — no town-scale survey exists, so Erwin's 2,755 acres read through its county's SSURGO summaryfrom Harnett County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Harnett County
- The growing challenges every North Carolina grower plans around — written at state scale, so they stay on the state guidefrom North Carolina
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Harnett County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Erwin's 2,755 acreswhy one lot differs from the next →
- Which side of Erwin you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 2,755 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.2 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 Erwin-wide figureread your own land →
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