The Southwest Georgia / Dougherty Plain spans USDA hardiness zones 8b-9a — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
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. Growers here do well with okra, tomato, collard greens, and sweet potato — with the usual caveat that any single yard's soil, sun, and drainage cast the deciding vote.
The Southwest Georgia / Dougherty Plain spans Georgia.
Your yard isn't all of the Southwest Georgia / Dougherty Plain.
The Southwest Georgia / Dougherty Plain spans USDA zones 8b-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 Southwest Georgia / Dougherty Plain — soil, climate, flood, and parcel records. How we handle your address.
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The Southwest Georgia / Dougherty Plain — the short answer
The Southwest Georgia / Dougherty Plain: USDA zones 8b-9a, 287–305 frost-free days, in Georgia.
- USDA zones
- 8b-9a
- USDA PHZM 2023, aggregated over the footprint
- Frost-free season
- 287–305 days
- NOAA Regional Climate Centers ACIS, 1991-2020
- Counties
- 15
- 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 Southwest Georgia / Dougherty Plain
Plants matched to the Southwest Georgia / Dougherty Plain's USDA zones 8b-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 Southwest Georgia / Dougherty Plain
Plants the USDA PLANTS Database documents as native and present in this region’s state, kept only where the published hardiness range meets the Southwest Georgia / Dougherty Plain’s USDA zones 8b-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 Southwest Georgia / Dougherty Plain
The USDA soil survey maps this ground county by county. These are those records weighted by land area across 15 member counties — this region’s own profile, not a state figure.
The ground is predominantly Ultisols, at 91% of mapped acres, followed by Entisols (6%), Alfisols (2%) and Inceptisols (1%). Five 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 Tifton, Greenville, and Orangeburg.
63% of those acres are well drained, and another 19% poorly drained, 6% moderately well drained. Topsoil pH runs 4.6–6.0 between the lowest and the highest county on record. 50% of the footprint is classed prime farmland.
Soil order
Ultisols
Drainage
Well drained
Topsoil pH
4.6–6.0
Hydric soils
19%
Soil changes across a driveway, so which of these your own ground sits on is a parcel question rather than a regional one. Colquitt County holds the most wetland ground here, at 29% — soil types explained.
USDA NRCS SSURGO via Soil Data Access
What this means for growing in the Southwest Georgia / Dougherty Plain
The soil survey reads this ground county by county, and the readings above are those records summed across the Southwest Georgia / Dougherty Plain. Here is what they mean for a garden here — and the move an experienced grower makes about each one.
Drainage
From county records63% of the mapped acres across the Southwest Georgia / Dougherty Plain are well drained — ground that drains quickly. That is area-weighted across all 15 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 Southwest Georgia / Dougherty Plain runs pH 4.6–6.0 — acidic in all 15 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
Wet ground
From county recordsAbout 19% of the ground across the Southwest Georgia / Dougherty Plain is mapped as hydric — wetland — soil. Colquitt County carries the most, at 29%.
If your lot falls in one of those pockets, a standard in-ground bed will fight waterlogging all season, and roots that need air will struggle.
Check how your own ground drains before you dig; raised beds or moisture-loving plantings turn a wet corner from a problem into a niche.
USDA NRCS SSURGO
Safe to Grow Here?
What the federal record shows across the Southwest Georgia / Dougherty Plain — and how to grow with it.
Across the Southwest Georgia / Dougherty Plain's 15 counties the federal record holds 3,057 documented sites, mostly Underground Storage Tanks (1,821), Nitrate (798) and Brownfields (252). The heaviest single county is Dougherty County, with 768.
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 Southwest Georgia / Dougherty Plain to see which records sit where you actually grow.
Sources Checked
Summed across the 15 counties in the Southwest Georgia / Dougherty Plain
A note from Gnorman
What an experienced grower watches for around here
In and around the Southwest Georgia / Dougherty Plain, two things run higher than the national average across the 15 counties in the Southwest Georgia / Dougherty Plain — Superfund (39 sites) and Nitrate (798 sites). That's not a problem with your land — it's information about it.
Superfund: Superfund sites represent the most severe contamination in the federal system.
Nitrate: Nitrate contamination primarily comes from agricultural fertilizer runoff and failing septic systems.
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Sources: EPA, USGS — 1.8M documented sites tracked nationwide across 9 federal source types.
Your land is one point inside the Southwest Georgia / Dougherty Plain
Everything above resolves to the Southwest Georgia / Dougherty Plain as a whole — a footprint spanning USDA zones 8b-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 Southwest Georgia / Dougherty Plain Average
Southwest Georgia / Dougherty Plain Average
- ●USDA Zones 8b-9a, averaged across Southwest Georgia / Dougherty Plain
- ●One soil character for all of Southwest Georgia / Dougherty Plain
- ●State-average frost dates
YOUR Parcel
- ✓Your exact zone, not Southwest Georgia / Dougherty Plain's 8b-9a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your parcel in the Southwest Georgia / Dougherty Plain
Pull a site-specific report for your exact address in the Southwest Georgia / Dougherty Plain — soil, sun, drainage, frost risk, contamination, and scored plant recommendations.
Three things about your lot that Southwest Georgia / Dougherty Plain averages can't show:
We read public map data around The Southwest Georgia / Dougherty Plain — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Southwest Georgia / Dougherty Plain average
How we know this about the Southwest Georgia / Dougherty Plain
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 Southwest Georgia / Dougherty Plain
What hardiness zone is the Southwest Georgia / Dougherty Plain?
The Southwest Georgia / Dougherty Plain spans USDA hardiness zones 8b-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 Southwest Georgia / Dougherty Plain?
Measured between 28°F hard freezes, the Southwest Georgia / Dougherty Plain's counties mostly run 290 to 297 frost-free days, median 292 (NOAA Regional Climate Centers ACIS, 1991–2020, over 15 member counties). That 7-day spread is the honest read — no single season describes 15 counties, and each county guide below carries its own.
When does frost risk end in the Southwest Georgia / Dougherty Plain?
Across the Southwest Georgia / Dougherty Plain, the middle half of member counties see their last 28°F hard freeze between Feb 11 and Feb 18 (median Feb 14), and their first fall freeze between Dec 3 and Dec 7. Those are hard freezes, not the last light frost: tender transplants wait for about Mar 7, and elevation decides which end of a 7-day spread you garden in.
What grows well in the Southwest Georgia / Dougherty Plain?
The Southwest Georgia / Dougherty Plain's 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 Southwest Georgia / Dougherty Plain defined?
The Southwest Georgia / Dougherty Plain is defined here as a curated cluster of 15 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 Southwest Georgia / Dougherty Plain cover?
The Southwest Georgia / Dougherty Plain 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, Deep South Georgia / Wiregrass, and Sea Islands share at least one state with the Southwest Georgia / Dougherty Plain. 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 Southwest Georgia / Dougherty Plain’s own scale
6 of the readings below were taken at the Southwest Georgia / Dougherty Plain's own scale — the zone 8b-9a band across its footprint, a median 292-day season across its 15 counties and 3,057 documented federal contamination records across its 15 counties, 768 of them in Dougherty County alone; one is borrowed from a wider read, named and linked below.
Measured here
- The USDA hardiness band 8b-9a aggregated across all 15 counties in the footprintUSDA PHZM 2023
- The boundary itself — the 15 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 15 counties run 290 to 297 frost-free days, median 292NOAA Regional Climate Centers ACIS, 1991-2020
- The federal contamination record over the whole footprint — 3,057 documented federal contamination records across its 15 counties, 768 of them in Dougherty County aloneEPA, USGS and USDA federal site records
- The soil order mix across the footprint — 91% Ultisols, topsoil pH 4.6–6.0, area-weighted across its 15 mapped countiesUSDA NRCS SSURGO
Inherited from a wider read
- The candidate plant list — its state's curated sets, merged and filtered to zones 8b-9afrom Georgia
What this page can’t tell you
- Which end of the 7-day range your ground sits at — 290 days at one extreme, 297 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 Southwest Georgia / Dougherty Plain
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.
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.
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.