The Deep South Georgia / Wiregrass spans USDA hardiness zone 9a — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
Georgia's only zone 9a band — the far-south coastal plain around Valdosta, Waycross and the Okefenokee — runs roughly 285 to 301 frost-free days, some 40-plus more than the state's dominant 8b (about 250). That extra warmth genuinely shifts the palette: cold-hardy satsuma mandarins fruit and overwinter here, subtropicals survive most winters, and a full second crop is routine rather than a gamble. The catch is underfoot — deep, low-nutrient sandy longleaf-pine flatwoods that need building before they hold a productive garden. An 8b-centered Vidalia page and a mountains-to-coast state average both wash all of this out. Expect okra, tomato, collard greens, and sweet potato to be strong candidates here; the deciding factors on any one parcel stay local — soil, sun, and drainage.
The Deep South Georgia / Wiregrass spans Georgia.
Your yard isn't all of the Deep South Georgia / Wiregrass.
The Deep South Georgia / Wiregrass spans USDA zones 9a, 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 Deep South Georgia / Wiregrass — soil, climate, flood, and parcel records. How we handle your address.
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The Deep South Georgia / Wiregrass — the short answer
The Deep South Georgia / Wiregrass: USDA zones 9a, 285–301 frost-free days, in Georgia.
- USDA zones
- 9a
- USDA PHZM 2023, aggregated over the footprint
- Frost-free season
- 285–301 days
- NOAA Regional Climate Centers ACIS, 1991-2020
- Counties
- 11
- US Census TIGER/Line 2025
- Region type
- County cluster
- 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. Where a region publishes no measured season, no season figure is shown.
Hardiness Zone Range
What Grows in the Deep South Georgia / Wiregrass
Plants matched to the Deep South Georgia / Wiregrass' USDA zones 9a, 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 Deep South Georgia / Wiregrass
Plants the USDA PLANTS Database documents as native and present in this region’s state, kept only where the published hardiness range meets the Deep South Georgia / Wiregrass’s USDA zones 9a — 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 Deep South Georgia / Wiregrass
The USDA soil survey maps this ground county by county. These are those records weighted by land area across eleven member counties — this region’s own profile, not a state figure.
The ground is predominantly Ultisols, at 53% of mapped acres, followed by Spodosols (24%), Histosols (10%) and Inceptisols (9%). Six 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 Pelham, Surrency, and Leefield.
45% of those acres are poorly drained, and another 25% very poorly drained, 13% somewhat poorly drained. Topsoil pH runs 4.6–5.5 between the lowest and the highest county on record. 7% of the footprint is classed prime farmland.
Soil order
Ultisols
Drainage
Poorly drained
Topsoil pH
4.6–5.5
Hydric soils
68%
Soil changes across a driveway, so which of these your own ground sits on is a parcel question rather than a regional one. Clinch County holds the most wetland ground here, at 96% — soil types explained.
USDA NRCS SSURGO via Soil Data Access
What this means for growing in the Deep South Georgia / Wiregrass
The soil survey reads this ground county by county, and the readings above are those records summed across the Deep South Georgia / Wiregrass. Here is what they mean for a garden here — and the move an experienced grower makes about each one.
Drainage
From county records45% of the mapped acres across the Deep South Georgia / Wiregrass are poorly drained — ground that sheds water slowly. That is area-weighted across all eleven of its mapped counties.
Beds can stay saturated for days after heavy rain, and the roots of most vegetables, berries, and fruit trees suffocate or rot in soil that never drains.
Raised beds or mounded rows lift roots above the wet zone; choose water-tolerant crops for the lowest spots.
USDA NRCS SSURGO
Surface pH
From county recordsTopsoil across the Deep South Georgia / Wiregrass runs pH 4.6–5.5 — acidic in all eleven 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 Deep South Georgia / Wiregrass — and how to grow with it.
Across the Deep South Georgia / Wiregrass' 11 counties the federal record holds 1,661 documented sites, mostly Underground Storage Tanks (1,026), Nitrate (346) and Brownfields (161). The heaviest single county is Lowndes County, with 637.
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 Deep South Georgia / Wiregrass to see which records sit where you actually grow.
Sources Checked
Summed across the 11 counties in the Deep South Georgia / Wiregrass
A note from Gnorman
What an experienced grower watches for around here
In and around the Deep South Georgia / Wiregrass, two things run higher than the national average across the 11 counties in the Deep South Georgia / Wiregrass — PFAS (14 sites) and Underground Storage Tanks (1,026 sites). It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
PFAS: PFAS (per- and polyfluoroalkyl substances) are called "forever chemicals" because they do not biodegrade.
Underground Storage Tanks: Underground storage tanks are the single most common source of soil contamination near homes and gardens.
Test irrigation water source — this is the primary pathway for PFAS to reach garden crops.
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 Deep South Georgia / Wiregrass
Everything above resolves to the Deep South Georgia / Wiregrass as a whole — a footprint spanning USDA zones 9a. Your parcel sits in exactly one of them. 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 Deep South Georgia / Wiregrass Average
Deep South Georgia / Wiregrass Average
- ●USDA Zones 9a, averaged across Deep South Georgia / Wiregrass
- ●One soil character for all of Deep South Georgia / Wiregrass
- ●State-average frost dates
YOUR Parcel
- ✓Your exact zone, not Deep South Georgia / Wiregrass' 9a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your parcel in the Deep South Georgia / Wiregrass
Pull a site-specific report for your exact address in the Deep South Georgia / Wiregrass — soil, sun, drainage, frost risk, contamination, and scored plant recommendations.
Three things about your lot that Deep South Georgia / Wiregrass averages can't show:
We read public map data around The Deep South Georgia / Wiregrass — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Deep South Georgia / Wiregrass average
How we know this about the Deep South Georgia / Wiregrass
The boundary: a cluster of neighboring counties. 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 Deep South Georgia / Wiregrass
What hardiness zone is the Deep South Georgia / Wiregrass?
The Deep South Georgia / Wiregrass spans USDA hardiness zones 9a, 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 Deep South Georgia / Wiregrass?
Measured between 28°F hard freezes, the Deep South Georgia / Wiregrass' counties mostly run 291 to 298 frost-free days, median 295 (NOAA Regional Climate Centers ACIS, 1991–2020, over 11 member counties). That 7-day spread is the honest read — no single season describes 11 counties, and each county guide below carries its own.
When does frost risk end in the Deep South Georgia / Wiregrass?
Across the Deep South Georgia / Wiregrass, the middle half of member counties see their last 28°F hard freeze between Feb 12 and Feb 15 (median Feb 14), and their first fall freeze between Dec 3 and Dec 8. Those are hard freezes, not the last light frost: tender transplants wait for about Mar 7, and elevation decides which end of a 3-day spread you garden in.
What grows well in the Deep South Georgia / Wiregrass?
The Deep South Georgia / Wiregrass' conditions suit plants such as Okra, Tomato, Collard Greens, Sweet Potato, Fig, 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 Deep South Georgia / Wiregrass defined?
The Deep South Georgia / Wiregrass is defined here as a curated cluster of 11 neighboring counties that share a growing character. Growing regions have no official boundary, so this footprint is our published one — every county in it is named on this page.
Which states does the Deep South Georgia / Wiregrass cover?
The Deep South Georgia / Wiregrass spans Georgia. Each state's full growing guide is linked on this page.
What other growing regions cover the same states?
Appalachia, Piedmont, Blue Ridge, Vidalia / South Georgia, Southwest Georgia / Dougherty Plain, and Sea Islands share at least one state with the Deep South Georgia / Wiregrass. 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 Deep South Georgia / Wiregrass’s own scale
6 of the readings below were taken at the Deep South Georgia / Wiregrass' own scale — the zone 9a band across its footprint, a median 295-day season across its 11 counties and 1,661 documented federal contamination records across its 11 counties, 637 of them in Lowndes County alone; one is borrowed from a wider read, named and linked below.
Measured here
- The USDA hardiness band 9a aggregated across all 11 counties in the footprintUSDA PHZM 2023
- The boundary itself — the 11 counties this region is curated fromGrowable Ground subregion registry
- 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 11 counties run 291 to 298 frost-free days, median 295NOAA Regional Climate Centers ACIS, 1991-2020
- The federal contamination record over the whole footprint — 1,661 documented federal contamination records across its 11 counties, 637 of them in Lowndes County aloneEPA, USGS and USDA federal site records
- The soil order mix across the footprint — 53% Ultisols, topsoil pH 4.6–5.5, area-weighted across its 11 mapped countiesUSDA NRCS SSURGO
Inherited from a wider read
- The candidate plant list — its state's curated sets, merged and filtered to zones 9afrom Georgia
What this page can’t tell you
- Which end of the 7-day range your ground sits at — 291 days at one extreme, 298 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 Deep South Georgia / Wiregrass
State growing guides
Counties in this region
Other growing regions across Georgia
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 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.
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.
Unlike Georgia's sandy east-central Vidalia belt or the state's mountains-to-coast average, this is the Dougherty Plain — a flat karst-limestone plain around Albany where near-surface limestone leaves soils near-neutral and center-pivots draw the Floridan aquifer (EPA Level IV ecoregion 65g). It is Georgia's row-crop heartland: peanuts, pecans, cotton, and corn on a long 8b–9a season of roughly 290–305 frost-free days. Growers here plan around limestone-derived soil chemistry and irrigation-fed summers rather than the acidic Coastal Plain sands that define most of the Southeast.
The barrier-island strip where Georgia and South Carolina meet the Atlantic — a two-state maritime band the mainland Lowcountry page doesn't reach. With ocean and tidal water on nearly every side, the frost-free season runs longer here than inland: a ~302-day median across the region's own coastal counties (vs ~290 for the mainland Lowcountry), stretching past 315 days on the sea islands around Beaufort and Charleston. The footprint is almost uniformly 9a — only inland-edge Colleton dips to 8b. Sandy island soils and salt air shaped a distinct growing tradition: Sea Island cotton, the extra-long-staple crop historically tied to these very islands, and the Gullah-Geechee garden of okra, benne, field peas, and sweet potato.