Southport, North Carolina, sits in USDA hardiness zone 8b — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
Reliable performers under these conditions include cabbage, fig, california poppy, and collard greens; what your own ground favors still comes down to its soil, sun, and drainage.
Even in Southport, 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 Southport 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 Southport — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Southport — the short answer
Southport, North Carolina: USDA zone 8b, about 265 days between hard freezes, across 3K acres of city.
- USDA zone
- 8b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 8
- Brunswick County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Nov 28
- Brunswick County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~265
- Brunswick 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 Brunswick County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 8b is Southport's average, not your lot's — a low corner or a tree line moves it. Against Southport's 265-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Southport
Each reading below is measured for Southport itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsSouthport runs about 265 days between hard freezes (read from Brunswick County, the closest normal to Southport) — 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
MeasuredSouthport 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 Southport is in
Southport sits in the Middle Atlantic Coastal Plain — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Southport's own centroid rather than borrowed from Brunswick County.
What Grows in Southport
Every plant below cleared Southport's own zone 8b and its 265-day season. Each card opens that plant's North Carolina profile. How we score.
Is it too late to plant in Southport?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Feb 8; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 8 (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. In a climate this gentle, “too late” hardly applies — the question becomes which crops prefer the cooler months ahead.
Documented around Southport
Spotted lanternfly documented 22 miles from Southport, first recorded 2023. What to watch for.
What's on the federal record near Southport
Closest first, within ~10 miles of Southport. Listing isn't leaking, and distance isn't exposure.
- LIFT STATIONUnderground Storage Tanks · 1100 ft
- BR-011Nitrate · 2500 ft
- BR-082 NC-198 SOUTHPORT RS CASTLE HAYNENitrate · 0.6 mi
- BR-083 NC-199 SOUTHPORT RS SURFICIALNitrate · 0.6 mi
- JOHN C. CAMPBELL ESTATEUnderground Storage Tanks · 0.6 mi
- BR-268Nitrate · 0.6 mi
- DEEP POINT MARINAUnderground Storage Tanks · 0.7 mi
- CPI USA NORTH CAROLINA - SOUTHPORT PLANTToxics Release Inventory · 0.7 mi
- S & S BEACH STOPUnderground Storage Tanks · 0.7 mi
- BALD HEAD ISLAND MARINAUnderground Storage Tanks · 0.8 mi
- BR-010Nitrate · 0.8 mi
- PUBLIC WORKS BUILDINGUnderground Storage Tanks · 0.8 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Southport'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 Southport.
Total Sites
218
within ~10 miles of Southport
Risk Level
Elevated
Highest-severity
2 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Southport
Severity Distribution
within ~10 miles of Southport
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Southport, two things run higher than the national average within ~10 miles of Southport — PFAS (4 sites) and Nitrate (100 sites). Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
PFAS: PFAS (per- and polyfluoroalkyl substances) are called "forever chemicals" because they do not biodegrade.
Nitrate: Nitrate contamination primarily comes from agricultural fertilizer runoff and failing septic systems.
Test irrigation water source — this is the primary pathway for PFAS to reach garden crops.
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Check your specific parcel in Southport
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 Southport average
Your land is one point inside Southport
Everything above resolves to Southport as a whole — one PHZM band, read across 3K acres, with hard-freeze dates borrowed from Brunswick 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 Southport Average
Southport Average
- ●USDA Zones 8b, averaged across Southport
- ●One soil character for all of Southport
- ●Frost dates read at Southport's scale: Mar 8 to Nov 28
YOUR Parcel
- ✓Your exact zone, not Southport's 8b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Southport
Pull a site-specific report for your exact address in Southport, North Carolina — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Southport averages can't show:
We read public map data around Southport — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Southport average
How we know this about Southport
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 Brunswick 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 Southport
When does frost risk typically end in Southport?
The last hard freeze (28°F) in Southport typically lands around Mar 8, 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 29.
When is the first frost in Southport?
The first hard freeze (28°F) in Southport 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 265 days after the spring freeze cleared.
How long is the growing season in Southport?
Measured between 28°F hard freezes, Southport sees about 265 frost-free days — roughly Mar 8 through Nov 28, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Mar 29 to Nov 14, about 230 days.
Is the soil safe to grow vegetables in Southport?
The federal record around Southport is a meaningful one — 218 documented sites, mostly Nitrate entries (100), 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 Southport?
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 Southport's scale — its 8b band and its 265-day season. Your yard writes its own version of Southport'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 Southport’s own scale
6 of the readings below were taken at Southport's own scale — the 2,597 acres it covers and 218 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Southport's own USDA hardiness band, zones 8bUSDA PHZM 2023
- 218 documented contamination sites on the federal record near Southport, the closest Underground Storage Tanks record about 0.2 miles out from the town centreFederal environmental registers
- Southport's boundary and the 2,597 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 Southport's own centroid, the Middle Atlantic Coastal PlainUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Southportlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- The 28°F hard-freeze dates — Southport has no normal of its own, so its county's is the closest measured readfrom Brunswick County
- Soil character — no town-scale survey exists, so Southport's 2,597 acres read through its county's SSURGO summaryfrom Brunswick County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Brunswick 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 Brunswick County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Southport's 2,597 acreswhy one lot differs from the next →
- Which side of Southport you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 2,597 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 Southport-wide figureread your own land →