Williamston, North Carolina, sits in USDA hardiness zone 8a — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
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 Williamston, 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 Williamston 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 Williamston — soil, climate, flood, and parcel records. How we handle your address.
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Williamston — the short answer
Williamston, North Carolina: USDA zone 8a, about 261 days between hard freezes, across 3K acres of town.
- USDA zone
- 8a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 11
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 27
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~261
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 3K acres
- US Census TIGER/Line 2025
Every figure names the dataset it came from. Hard-freeze dates are this town’s own 28°F normals: light frosts run a few weeks past them, and tender transplants usually wait 2–3 weeks after the last hard freeze.
Hardiness Zone Range
Zone 8a is Williamston's average, not your lot's — a low corner or a tree line moves it. Against Williamston's 261-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Williamston
Each reading below is measured for Williamston itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredWilliamston runs about 261 days between hard freezes — 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
MeasuredWilliamston 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 Williamston is in
Williamston sits in the Middle Atlantic Coastal Plain — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Williamston's own centroid rather than borrowed from Martin County.
What Grows in Williamston
Every plant below cleared Williamston's own zone 8a and its 261-day season. Each card opens that plant's North Carolina profile. How we score.
Is it too late to plant in Williamston?
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 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 27 — 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 Williamston
Survey cells within 31 miles of Williamston checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 57 miles off. What to watch for.
What's on the federal record near Williamston
Closest first, within ~10 miles of Williamston. Listing isn't leaking, and distance isn't exposure.
- MR-210 WILLIAMSTON MUNNitrate · 1100 ft
- MR-209 WILLIAMSTON MUNNitrate · 1200 ft
- C.U. ROGERS AND GURGANUSUnderground Storage Tanks · 1500 ft
- MR-203 WILLIAMSTON MUNNitrate · 1500 ft
- WILLIAMSTON FIRE DEPTUnderground Storage Tanks · 1500 ft
- GET N GOUnderground Storage Tanks · 1700 ft
- MR-206 WILLIAMSTON MUNNitrate · 1700 ft
- BY-PASS SHELL SERVICEUnderground Storage Tanks · 1700 ft
- TOWN AND COUNTRY CLEANERSBrownfields · 1900 ft
- EF QS3Underground Storage Tanks · 1900 ft
- DIXIE MOTOR COBrownfields · 1900 ft
- PUBLIC WORKS DEPTUnderground Storage Tanks · 1900 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Williamston'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 Williamston.
Total Sites
219
within ~10 miles of Williamston
Risk Level
Elevated
Highest-severity
2 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Williamston
Severity Distribution
within ~10 miles of Williamston
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Williamston, Underground Storage Tanks runs higher than the national average — 166 sites within ~10 miles of Williamston. 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 Williamston
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 Williamston average
Your land is one point inside Williamston
Everything above resolves to Williamston as a whole — one PHZM band and one 28°F frost record, read across 3K acres. 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 Williamston Average
Williamston Average
- ●USDA Zones 8a, averaged across Williamston
- ●One soil character for all of Williamston
- ●Frost dates read at Williamston's scale: Mar 11 to Nov 27
YOUR Parcel
- ✓Your exact zone, not Williamston's 8a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Williamston
Pull a site-specific report for your exact address in Williamston, North Carolina — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Williamston averages can't show:
We read public map data around Williamston — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Williamston average
How we know this about Williamston
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 Williamston’s own record; 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 Williamston
When does frost risk typically end in Williamston?
The last hard freeze (28°F) in Williamston 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 Williamston?
The first hard freeze (28°F) in Williamston 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 261 days after the spring freeze cleared.
How long is the growing season in Williamston?
Measured between 28°F hard freezes, Williamston sees about 261 frost-free days — roughly Mar 11 through Nov 27, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 1 to Nov 13, about 226 days.
Is the soil safe to grow vegetables in Williamston?
The federal record around Williamston is a meaningful one — 219 documented sites, mostly Underground Storage Tanks entries (166), the nearest Nitrate 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 Williamston?
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 Williamston's scale — its 8a band and its 261-day season. Your yard writes its own version of Williamston'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 Williamston’s own scale
7 of the readings below were taken at Williamston's own scale — its own ~261-day season between 28°F freezes, the 2,887 acres it covers and 219 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Williamston's own USDA hardiness band, zones 8aUSDA PHZM 2023
- Williamston's own 28°F hard-freeze dates, about Mar 11 and Nov 27 and the ~261-day span between themNOAA 1991–2020 Climate Normals
- 219 documented contamination sites on the federal record near Williamston, the closest Nitrate record about 0.2 miles out from the town centreFederal environmental registers
- Williamston's boundary and the 2,887 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8a and a ~261-day seasonGrowable Ground crop-matching engine
- The ecoregion at Williamston's own centroid, the Middle Atlantic Coastal PlainUS EPA Level III Ecoregions
- Lanternfly survey cells around Williamston checked, none carrying a detectionlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Williamston's 2,887 acres read through its county's SSURGO summaryfrom Martin County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Martin 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 Martin County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Williamston's 2,887 acreswhy one lot differs from the next →
- Which side of Williamston you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 2,887 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate 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 Williamston-wide figureread your own land →
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