Simpson, North Carolina, sits in USDA hardiness zone 8a — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
Growers here do well with cabbage, fig, california poppy, and collard greens — with the usual caveat that any single yard's soil, sun, and drainage cast the deciding vote.
Even in Simpson, 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 Simpson 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 Simpson — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Simpson — the short answer
Simpson, North Carolina: USDA zone 8a, about 258 days between hard freezes, across 236 acres of town.
- USDA zone
- 8a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 12
- Pitt County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Nov 25
- Pitt County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~258
- Pitt County normal — NOAA 1991–2020, nearest to this town
- Town area
- 236 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 Pitt County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 8a is Simpson's average, not your lot's — a low corner or a tree line moves it. Against Simpson's 258-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Simpson
Each reading below is measured for Simpson itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsSimpson runs about 258 days between hard freezes (read from Pitt County, the closest normal to Simpson) — 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
MeasuredSimpson 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 Simpson is in
Simpson sits in the Middle Atlantic Coastal Plain — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Simpson's own centroid rather than borrowed from Pitt County.
What Grows in Simpson
Every plant below cleared Simpson's own zone 8a and its 258-day season. Each card opens that plant's North Carolina profile. How we score.
Is it too late to plant in Simpson?
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 25 — 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 Simpson
Survey cells within 31 miles of Simpson checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 71 miles off. What to watch for.
What's on the federal record near Simpson
Closest first, within ~10 miles of Simpson. Listing isn't leaking, and distance isn't exposure.
- SIMPSON-ONE-STOPUnderground Storage Tanks · 1000 ft
- PORTER SUPPLY COMPANYUnderground Storage Tanks · 1000 ft
- 33 EAST AUTO SALESBrownfields · 0.7 mi
- SPEEDWAY #8654Underground Storage Tanks · 0.7 mi
- WALL'S GROCERYUnderground Storage Tanks · 0.8 mi
- CALICO KID PIT STOPUnderground Storage Tanks · 0.8 mi
- GRIMESLAND GENERAL STOREUnderground Storage Tanks · 0.8 mi
- BILLY RAY HADDOCK FARMUnderground Storage Tanks · 0.8 mi
- DRUM HILL MARKETUnderground Storage Tanks · 0.8 mi
- COUNTRY STORE 4Underground Storage Tanks · 0.8 mi
- GRIMESLAND FERTILIZER SUPPLYUnderground Storage Tanks · 0.8 mi
- D.B. STOKES SHELL STATIONUnderground Storage Tanks · 0.8 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Simpson'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 Simpson.
Total Sites
521
within ~10 miles of Simpson
Risk Level
Elevated
Highest-severity
7 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Simpson
Severity Distribution
within ~10 miles of Simpson
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Simpson, two things run higher than the national average within ~10 miles of Simpson — Superfund (7 sites) and Underground Storage Tanks (322 sites). Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
Superfund: Superfund sites represent the most severe contamination in the federal system.
Underground Storage Tanks: Underground storage tanks are the single most common source of soil contamination near homes and gardens.
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Use raised beds with imported soil — this eliminates the primary soil-contact pathway.
Check your specific parcel in Simpson
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 Simpson average
Your land is one point inside Simpson
Everything above resolves to Simpson as a whole — one PHZM band, read across 236 acres, with hard-freeze dates borrowed from Pitt 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 Simpson Average
Simpson Average
- ●USDA Zones 8a, averaged across Simpson
- ●One soil character for all of Simpson
- ●Frost dates read at Simpson's scale: Mar 12 to Nov 25
YOUR Parcel
- ✓Your exact zone, not Simpson's 8a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Simpson
Pull a site-specific report for your exact address in Simpson, North Carolina — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Simpson averages can't show:
We read public map data around Simpson — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Simpson average
How we know this about Simpson
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 Pitt 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 Simpson
When does frost risk typically end in Simpson?
The last hard freeze (28°F) in Simpson 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 Simpson?
The first hard freeze (28°F) in Simpson typically arrives around Nov 25, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 11, so the watching starts about Oct 26 — about 258 days after the spring freeze cleared.
How long is the growing season in Simpson?
Measured between 28°F hard freezes, Simpson sees about 258 frost-free days — roughly Mar 12 through Nov 25, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 2 to Nov 11, about 223 days.
Is the soil safe to grow vegetables in Simpson?
The federal record around Simpson is a meaningful one — 521 documented sites, mostly Underground Storage Tanks entries (322), 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 Simpson?
From about Oct 26 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 25 (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 25. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Simpson's scale — its 8a band and its 258-day season. Your yard writes its own version of Simpson'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 Simpson’s own scale
6 of the readings below were taken at Simpson's own scale — the 236 acres it covers and 521 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Simpson's own USDA hardiness band, zones 8aUSDA PHZM 2023
- 521 documented contamination sites on the federal record near Simpson, the closest Underground Storage Tanks record about 0.2 miles out from the town centreFederal environmental registers
- Simpson's boundary and the 236 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8a and a ~258-day seasonGrowable Ground crop-matching engine
- The ecoregion at Simpson's own centroid, the Middle Atlantic Coastal PlainUS EPA Level III Ecoregions
- Lanternfly survey cells around Simpson checked, none carrying a detectionlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- The 28°F hard-freeze dates — Simpson has no normal of its own, so its county's is the closest measured readfrom Pitt County
- Soil character — no town-scale survey exists, so Simpson's 236 acres read through its county's SSURGO summaryfrom Pitt County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Pitt 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 Pitt County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Simpson's 236 acreswhy one lot differs from the next →
- Which side of Simpson you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 236 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 Simpson-wide figureread your own land →
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