The Blue Ridge spans USDA hardiness zones 6b-8a — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
The high, cool, forested spine of the southern Appalachians — layered ridges, acidic mountain loams, and a short upland season suited to apples and cold-hardy crops. A short list that earns its place here — okra, tomato, collard greens, and sweet potato — with any one site's soil, sun, and drainage making the final cut.
The Blue Ridge spans Georgia, North Carolina, Tennessee and Virginia. Its footprint follows the EPA Level III ecoregion boundary; the counties linked below are representative of the region, not an exhaustive list.
Your yard isn't all of the Blue Ridge.
The Blue Ridge spans USDA zones 6b-8a, but your parcel sits in exactly one — and slope, tree cover, and low spots nudge it further. 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 Blue Ridge — soil, climate, flood, and parcel records. How we handle your address.
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The Blue Ridge — the short answer
The Blue Ridge: USDA zones 6b-8a, 178–252 frost-free days depending where in it you stand, across 4 states.
- USDA zones
- 6b-8a
- USDA PHZM 2023, aggregated over the footprint
- Shortest season here
- 178 days
- NOAA Regional Climate Centers ACIS, 1991-2020 — Swain County
- Counties
- 41
- US Census TIGER/Line 2025
- Region type
- EPA ecoregion
- Growable Ground growing-region registry
Region boundary: Growable Ground growing-region registry — curated county clusters, EPA Level III ecoregions, and town clusters drawn finer than any county. The season figure is this region's own record, measured across its 41 member counties, not a state or national average.
Hardiness Zone Range
The Blue Ridge is not one growing season
One answer for the Blue Ridge averages 41 counties whose growing seasons are 74 days apart — from 178 frost-free days in Swain County to 252 in Cherokee County. That is the same region, measured the same way, in the same years. Which end of it your land sits nearer decides what finishes before the first hard freeze.
The middle half of 41 counties runs 200–224 days, with a median of 206 days — a 74-day span end to end.
Measured across 41 member counties, each carrying its own 28°F normal. NOAA Regional Climate Centers ACIS, 1991-2020. A member with no own record is absent from the range rather than counted as zero — nothing here is interpolated to the region. Your own site sits somewhere inside this range; a parcel report resolves where.
Where the line runs inside the Blue Ridge
The middle half of the Blue Ridge runs 200–224 frost-free days, and 19 of its 41 counties sit outside that — 10 on the short side, 9 on the long. A regional planting date describes the middle well and the ends poorly, which is worth knowing before you follow one.
Under 200 frost-free days
10 counties
- Swain County · 178 days
- Haywood County · 184 days
- Avery County · 187 days
3 of 10 shown
The end of the region that sets the planting calendar — start seed indoors here and the season stretches to meet the crop.
200–224 frost-free days
22 counties
0 of 22 shown
The middle half of the region, and the part a single regional season describes well.
Over 224 frost-free days
9 counties
- Cherokee County · 252 days
- Pickens County · 251 days
- Gilmer County · 235 days
3 of 9 shown
Long enough for a second succession of a quick crop after the first comes out.
Each county is placed by its OWN 28°F frost-free normal (NOAA Regional Climate Centers ACIS, 1991-2020), the same figure its own guide page publishes. Elevation, slope and cold-air drainage move a site within its county as well — which is the part only your address resolves.
What Grows in the Blue Ridge
All 3 of the plants below that publish a season requirement clear even Swain County’s 178 frost-free days — so on season alone, this grid works at both ends of the region. The 74-day spread still decides how far past this list you can push, and how early you can start.
Plants matched to the Blue Ridge's USDA zones 6b-8a, ordered by how much hardiness margin each has across the region — the ones with room to spare at both ends of this band lead. Each links to its full growing profile.
Native Plants of the Blue Ridge
Plants the USDA PLANTS Database documents as native and present in all 4 states this region crosses, kept only where the published hardiness range meets the Blue Ridge’s USDA zones 6b-8a — closest range match first. Presence is recorded by state, so a plant can be documented across the state and still be scarce in your corner of the region.
The ground across the Blue Ridge
The USDA soil survey maps this ground county by county. These are those records weighted by land area across 40 member counties — this region’s own profile, not a state figure.
The ground is predominantly Ultisols, at 52% of mapped acres, followed by Inceptisols (44%), Alfisols (3%) and Entisols (1%). Seven soil orders appear somewhere inside the footprint, which is the honest reason a regional soil answer only goes so far. The most extensive named soils are Evard, Edneyville, and Chestnut.
83% of those acres are well drained, and another 9% somewhat excessively drained, 2% moderately well drained. Topsoil pH runs 4.5–6.2 between the lowest and the highest county on record. 5% of the footprint is classed prime farmland.
Soil order
Ultisols
Drainage
Well drained
Topsoil pH
4.5–6.2
Hydric soils
1%
Soil changes across a driveway, so which of these your own ground sits on is a parcel question rather than a regional one. Alleghany County holds the most wetland ground here, at 4% — soil types explained.
USDA NRCS SSURGO via Soil Data Access · 40 of 41 footprint counties carry a summarizable record; the rest are absent from these figures rather than estimated.
What this means for growing in the Blue Ridge
The soil survey reads this ground county by county, and the readings above are those records summed across the Blue Ridge. Here is what they mean for a garden here — and the move an experienced grower makes about each one.
Drainage
From county records83% of the mapped acres across the Blue Ridge are well drained — ground that drains quickly. That is area-weighted across all 40 of its mapped counties.
The upside is soil you can work early in spring and roots that never drown; the cost is that fast-draining ground dries out fast and leaches nutrients away before plants can use them.
Work in compost and mulch to hold moisture and feed, and water more often in short doses than deep and rarely.
USDA NRCS SSURGO
Surface pH
From county recordsTopsoil across the Blue Ridge runs pH 4.5–6.2 — acidic in all 40 of them.
Blueberries, potatoes, and rhododendrons thrive in it, but most vegetables start locking out nutrients below about pH 6.0 and grow pale and stunted no matter how much you feed them.
A measured lime application raises pH for the crops that need it — but test first, because the right rate depends on your own soil, not the county average.
USDA NRCS SSURGO
Safe to Grow Here?
What the federal record shows across the Blue Ridge — and how to grow with it.
Across the Blue Ridge's 41 counties the federal record holds 7,739 documented sites, mostly Underground Storage Tanks (5,313), Brownfields (1,163) and Mining (480). The heaviest single county is Buncombe County, with 1,024.
That is a regional count, not a reading of any one lot — proximity to a documented site is information, not a diagnosis. Open the map outlined to the Blue Ridge to see which records sit where you actually grow.
Sources Checked
Summed across the 41 counties in the Blue Ridge
A note from Gnorman
What an experienced grower watches for around here
In and around the Blue Ridge, two things run higher than the national average across the 41 counties in the Blue Ridge — Mining (480 sites) and Underground Storage Tanks (5,313 sites). It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
Mining: Mining sites — both historic and active — can leach heavy metals (arsenic, lead, cadmium, mercury) into soil and water for centuries after operations cease.
Underground Storage Tanks: Underground storage tanks are the single most common source of soil contamination near homes and gardens.
Test soil for heavy metals (lead, arsenic, cadmium, mercury) — this is essential near any mining site.
Use raised beds with imported soil — this eliminates the primary soil-contact pathway.
Sources: EPA, USGS — 1.8M documented sites tracked nationwide across 9 federal source types.
Your land is one point inside the Blue Ridge
Everything above resolves to the Blue Ridge as a whole — a footprint whose own counties record seasons 74 days apart, and hardiness across zones 6b-8a. Your parcel sits at one point in that range, not in the middle of it. 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 region 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 regional average.
Your Lot vs the Blue Ridge Average
Blue Ridge Average
- ●USDA Zones 6b-8a, averaged across Blue Ridge
- ●One soil character for all of Blue Ridge
- ●State-average frost dates
YOUR Parcel
- ✓Your exact zone, not Blue Ridge's 6b-8a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your parcel in the Blue Ridge
Pull a site-specific report for your exact address in the Blue Ridge — soil, sun, drainage, frost risk, contamination, and scored plant recommendations.
Three things about your lot that Blue Ridge averages can't show:
We read public map data around The Blue Ridge — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Blue Ridge average
How we know this about the Blue Ridge
The boundary: an EPA Level III ecoregion (an area sharing climate, soils, and vegetation). Growing regions have no official boundary, so this footprint is our published one, and every figure on this page was measured over the counties inside it rather than borrowed from the state around it.
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, aggregated across the footprint; the growing season from NOAA Regional Climate Centers ACIS 1991–2020 28°F normals, read at each member’s own record; boundaries from US Census TIGER/Line 2025; the contamination record from the federal sources named in that beat above; the soil from the USDA NRCS SSURGO survey, read at each member county’s own record and weighted to this footprint by land area. Where a member carries no record of its own, it is absent from the figure rather than filled in.
Common questions about the Blue Ridge
What hardiness zone is the Blue Ridge?
The Blue Ridge spans USDA hardiness zones 6b-8a, aggregated from the USDA Agricultural Research Service Plant Hardiness Zone Map 2023 across the region's counties. Zones reflect average annual extreme minimum temperatures from 1991–2020 data.
How long is the growing season in the Blue Ridge?
Measured between 28°F hard freezes, the Blue Ridge's counties mostly run 200 to 224 frost-free days, median 206 (NOAA Regional Climate Centers ACIS, 1991–2020, over 41 member counties). That 24-day spread is the honest read — no single season describes 41 counties, and each county guide below carries its own.
When does frost risk end in the Blue Ridge?
Across the Blue Ridge, the middle half of member counties see their last 28°F hard freeze between Mar 30 and Apr 10 (median Apr 7), and their first fall freeze between Oct 26 and Nov 7. Those are hard freezes, not the last light frost: tender transplants wait for about Apr 28, and elevation decides which end of a 11-day spread you garden in.
What grows well in the Blue Ridge?
The Blue Ridge's conditions suit plants such as Okra, Tomato, Collard Greens, Sweet Potato, Iris, Peach. What actually thrives on any one site still turns on its specific soil, sun, and drainage — we score each plant against the real conditions at your address.
How is the Blue Ridge defined?
The Blue Ridge's footprint follows an EPA Level III ecoregion — a boundary drawn where climate, soils, and vegetation actually change rather than where a state line falls. It covers 41 counties, and the counties linked on this page are representative of the region, not an exhaustive list.
Which states does the Blue Ridge cover?
The Blue Ridge spans Georgia, North Carolina, Tennessee, and Virginia. Each state's full growing guide is linked on this page.
What other growing regions cover the same states?
Appalachia, Piedmont, Mississippi Delta, Tidewater & Chesapeake, Vidalia / South Georgia, and West Tennessee (Gulf Coastal Plain / Loess Plains) share at least one state with the Blue Ridge. Growing regions overlap and interlock — a single address can sit inside more than one, which is why the precise read is always the parcel, not the region.
What this page reads at the Blue Ridge’s own scale
6 of the readings below were taken at the Blue Ridge's own scale — the zone 6b-8a band across its footprint, a median 206-day season across its 41 counties and 7,739 documented federal contamination records across its 41 counties, 1,024 of them in Buncombe County alone; one is borrowed from a wider read, named and linked below.
Measured here
- The USDA hardiness band 6b-8a aggregated across all 41 counties in the footprintUSDA PHZM 2023
- The boundary itself — the EPA Level III ecoregion its 41 counties sit inside, drawn where climate and soils changeEPA Level III Ecoregions
- The growing character that makes this region distinct from the states it crossesGrowable Ground subregion registry
- The 28°F season across the footprint — the middle half of its 41 counties run 200 to 224 frost-free days, median 206NOAA Regional Climate Centers ACIS, 1991-2020
- The federal contamination record over the whole footprint — 7,739 documented federal contamination records across its 41 counties, 1,024 of them in Buncombe County aloneEPA, USGS and USDA federal site records
- The soil order mix across the footprint — 52% Ultisols, topsoil pH 4.5–6.2, area-weighted across its 40 mapped countiesUSDA NRCS SSURGO
Inherited from a wider read
- The candidate plant list — all 4 member states' curated sets, merged and filtered to zones 6b-8afrom Georgia, North Carolina, Tennessee and Virginia
What this page can’t tell you
- Which end of the 24-day range your ground sits at — 200 days at one extreme, 224 at the other, decided mostly by elevationfrost dates explained →
- Which of those soils your own ground sits on — the survey maps them county-wide, and they change across a drivewaysoil types explained →
- The soil pH, drainage, sun hours, and frost pockets on one specific lotwhy one lot differs from the next →
Explore the Blue Ridge
State growing guides
Representative counties
Other growing regions across Georgia, North Carolina, Tennessee, and Virginia
The vast eastern mountain region of steep hollows, thin acidic soils, and short upland seasons — apples, brambles, ramps, and forest crops on hard-won ground. (Union of the core Appalachian ecoregions.)
The rolling foothill belt between the Appalachians and the coastal plain, defined by heavy red clay soils that reward amendment and drainage. (Southern Piedmont; the Northern Piedmont is a separate ecoregion.)
The flat, deep, dark alluvial bottomland of the lower Mississippi River — extraordinarily fertile cotton, soybean, rice, and sweet-potato ground.
The low, flat, tidal coastal plain around Chesapeake Bay — sandy soils, mild maritime winters, and a long season for vegetables and Southern staples.
The federally designated Vidalia sweet-onion belt of Georgia's coastal plain — USDA zones 8b to 9a and a long frost-free season of roughly 290 days, from a median last frost near February 18 to a first frost around December 4.
West Tennessee is the state's warmest, flattest, longest-season country — the entire Grand Division west of the Tennessee River. Its southwest corner around Memphis is Tennessee's only broad USDA 8a band (Shelby 266, Tipton 262, Lauderdale 257, Haywood 248, Fayette 245 frost-free days), while the upland plain runs a long 7b of 228–241 days, materially longer than Middle Tennessee's Nashville Basin. The growing medium is different too: deep windblown loess and sandy Coastal Plain soils (EPA Mississippi Valley Loess Plains and Southeastern Plains ecoregions), not the limestone basin or the acidic sandstone plateau that define the rest of the state.