Greenbrier, Tennessee, sits in USDA hardiness zone 7a — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
On paper, cabbage, hazelnut, california poppy, and collard greens all suit these conditions — on the ground, soil, sun, and drainage make the final call.
Even in Greenbrier, 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 Greenbrier 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 Greenbrier — soil, climate, flood, and parcel records. How we handle your address.
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Greenbrier — the short answer
Greenbrier, Tennessee: USDA zone 7a, about 226 days between hard freezes, across 5K acres of town.
- USDA zone
- 7a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 27
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 8
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~226
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 5K 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 7a is Greenbrier's average, not your lot's — a low corner or a tree line moves it. Against Greenbrier's 226-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Greenbrier
Each reading below is measured for Greenbrier itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredGreenbrier runs about 226 days between hard freezes — 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
MeasuredGreenbrier sits in USDA hardiness zone 7a.
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 Greenbrier is in
Greenbrier sits in the Interior Plateau — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Greenbrier's own centroid rather than borrowed from Robertson County.
What Grows in Greenbrier
Every plant below cleared Greenbrier's own zone 7a and its 226-day season. Each card opens that plant's Tennessee profile. How we score.
Is it too late to plant in Greenbrier?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Feb 27; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 27 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 8 — 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 Greenbrier
Spotted lanternfly documented 18 miles from Greenbrier, first recorded 2023. What to watch for.
What's on the federal record near Greenbrier
Closest first, within ~10 miles of Greenbrier. Listing isn't leaking, and distance isn't exposure.
- HULL'S ENVIRONMENTAL SERVICES, INC.Brownfields · 700 ft
- Roach's AmocoUnderground Storage Tanks · 2500 ft
- Highland Rim Speedway*Underground Storage Tanks · 0.7 mi
- Wedgewood Indust. IncUnderground Storage Tanks · 0.7 mi
- K and S MarketUnderground Storage Tanks · 0.9 mi
- Stratton AutomotiveUnderground Storage Tanks · 0.9 mi
- City Of GreenbrierUnderground Storage Tanks · 1.0 mi
- Greenbrier Market #2Underground Storage Tanks · 1.0 mi
- Pure Mkt P-66Underground Storage Tanks · 1.0 mi
- Drakes's Auto RepairUnderground Storage Tanks · 1.1 mi
- ENSOL, LLCBrownfields · 1.3 mi
- Oak Hills Golf CourseUnderground Storage Tanks · 1.3 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Greenbrier'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 Greenbrier.
Total Sites
288
within ~10 miles of Greenbrier
Risk Level
Elevated
Highest-severity
1 Superfund site (none NPL-listed)
Sources Checked
within ~10 miles of Greenbrier
Severity Distribution
within ~10 miles of Greenbrier
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Greenbrier, two things run higher than the national average within ~10 miles of Greenbrier — Toxics Release Inventory (21 sites) and Underground Storage Tanks (205 sites). It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
Toxics Release Inventory: TRI facilities report annual chemical releases to air, water, and land.
Underground Storage Tanks: Underground storage tanks are the single most common source of soil contamination near homes and gardens.
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Use raised beds with imported soil — this eliminates the primary soil-contact pathway.
Check your specific parcel in Greenbrier
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 Greenbrier average
Your land is one point inside Greenbrier
Everything above resolves to Greenbrier as a whole — one PHZM band and one 28°F frost record, read across 5K 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 Greenbrier Average
Greenbrier Average
- ●USDA Zones 7a, averaged across Greenbrier
- ●One soil character for all of Greenbrier
- ●Frost dates read at Greenbrier's scale: Mar 27 to Nov 8
YOUR Parcel
- ✓Your exact zone, not Greenbrier's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Greenbrier
Pull a site-specific report for your exact address in Greenbrier, Tennessee — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Greenbrier averages can't show:
We read public map data around Greenbrier — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Greenbrier average
How we know this about Greenbrier
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 Greenbrier’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 Greenbrier
When does frost risk typically end in Greenbrier?
The last hard freeze (28°F) in Greenbrier typically lands around Mar 27, 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 17.
When is the first frost in Greenbrier?
The first hard freeze (28°F) in Greenbrier typically arrives around Nov 8, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 25, so the watching starts about Oct 9 — about 226 days after the spring freeze cleared.
How long is the growing season in Greenbrier?
Measured between 28°F hard freezes, Greenbrier sees about 226 frost-free days — roughly Mar 27 through Nov 8, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 17 to Oct 25, about 191 days.
Is the soil safe to grow vegetables in Greenbrier?
The federal record around Greenbrier is a meaningful one — 288 documented sites, mostly Underground Storage Tanks entries (205), the nearest Brownfields 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 Greenbrier?
From about Oct 9 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 8 (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 8. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Greenbrier's scale — its 7a band and its 226-day season. Your yard writes its own version of Greenbrier'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 Greenbrier’s own scale
7 of the readings below were taken at Greenbrier's own scale — its own ~226-day season between 28°F freezes, the 4,647 acres it covers and 288 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Greenbrier's own USDA hardiness band, zones 7aUSDA PHZM 2023
- Greenbrier's own 28°F hard-freeze dates, about Mar 27 and Nov 8 and the ~226-day span between themNOAA 1991–2020 Climate Normals
- 288 documented contamination sites on the federal record near Greenbrier, the closest Brownfields record about 0.1 miles out from the town centreFederal environmental registers
- Greenbrier's boundary and the 4,647 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~226-day seasonGrowable Ground crop-matching engine
- The ecoregion at Greenbrier's own centroid, the Interior PlateauUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Greenbrierlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Greenbrier's 4,647 acres read through its county's SSURGO summaryfrom Robertson County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Robertson County
- The growing challenges every Tennessee grower plans around — written at state scale, so they stay on the state guidefrom Tennessee
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Robertson County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Greenbrier's 4,647 acreswhy one lot differs from the next →
- Which side of Greenbrier you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 4,647 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields 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 Greenbrier-wide figureread your own land →
More in Tennessee
Wider growing context
What grows across TennesseeGreenbrier sits outside our named growing regions, so Tennessee as a whole is its closest context here.
Nearby growing guides