Tattnall County, in Georgia, sits in USDA hardiness zone 9a — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
A short list that earns its place here — artichoke, fig, california poppy, and cabbage — with any one site's soil, sun, and drainage making the final cut.
Tattnall County lies within the Vidalia / South Georgia — a regional growing area with its own character.
Grounded in USDA PHZM 2023 · Growable Ground suitability scoring · NOAA 1991–2020 Climate Normals
Tattnall County holds more than one microclimate.
Soils and elevations shift across Tattnall County, so your frost dates and drainage aren't the county average. 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 Tattnall County — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Tattnall County — the short answer
Tattnall County, Georgia: USDA zone 9a, about 293 days between hard freezes, across 308K acres.
- USDA zone
- 9a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Feb 15
- NOAA 1991–2020 Climate Normals, 28°F
- First hard freeze (28°F)
- Dec 5
- NOAA 1991–2020 Climate Normals, 28°F
- Days between freezes
- ~293
- NOAA 1991–2020 Climate Normals, 28°F
- County area
- 308K acres
- US Census TIGER/Line 2025
Every figure names the dataset it came from. Hard-freeze dates are county 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 9a is Tattnall County's average, not your lot's — a low corner or a tree line moves it. Against Tattnall County's 293-day season, see what your own ground reads.
Heat and winter chill in Tattnall County
Across a year, Tattnall County accumulates about 6,086 growing degree days above 50°F, about 671 more than the middle Georgia county — ahead of 129 of Georgia’s 159 counties. Degree days are the heat a crop actually gets to work with — more of them is more room to ripen a long-season crop before the freeze closes the window.
Winter banks about 674 hours below 45°F, 462 fewer than the Georgia middle of 1,136. Chill is what tells a fruit tree its dormancy is over, and it is set by climate rather than by anything you can build.
Grounded in PRISM Climate Group, Oregon State University — 1991–2020 monthly normals
Soil in Tattnall County
Across Tattnall County, the ground is predominantly Ultisols, where Tifton, Pelham, and Osier are the most extensive named soil series. The soil is generally well drained with a loamy sand surface. Topsoil pH runs about 4.8–5.5, strongly acidic. Rainfall drains through hydrologic group B soils.
Soil order
Ultisols
Drainage
Well drained
Prime farmland
24%
Hydric soils
35%
Soil still varies lot by lot — soil types explained.
How the ground varies across Tattnall County
The USDA soil survey maps 38% of Tattnall County as well drained — but another 60% drains differently: 31% poorly drained, 15% somewhat poorly drained.
Tifton is the most extensive named soil at 18% of mapped acres, then Pelham (13%) and Osier (11%).
Which of them your own lot sits on is a parcel question, not a county one. Check your address for the survey at your boundary.
What this means for growing in Tattnall County
Each reading below is measured for Tattnall County itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Drainage
MeasuredThe dominant soils across Tattnall County are well drained, in hydrologic group B — ground that drains quickly.
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
MeasuredTopsoil across Tattnall County runs about pH 4.8–5.5, on the acidic side.
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
MeasuredAbout 35% of Tattnall County is mapped as hydric — wetland — soil.
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
Season length
MeasuredTattnall County runs about 293 days between hard freezes — close to year-round growing.
Frost is rarely the limit here; winter plantings are as real as summer ones, and the harder question is which crops shrug off the summer heat.
Grow cool-season crops through the mild winter, and choose heat-tolerant varieties for the summer beds.
NOAA 1991–2020 Climate Normals
The kind of country Tattnall County is in
Tattnall County spans 2 EPA Level III ecoregions — Southeastern Plains (84%) and Southern Coastal Plain (16%). Which one your land falls in changes what grows wild there and how the ground behaves, and a county-wide answer cannot tell you which.
What Grows in Tattnall County
We scored all 1,086 plants against Tattnall County's own USDA zone 9a and its own 293-day season between hard freezes, using the same matching engine that runs a full parcel report. These cleared both. Sun, soil pH and drainage vary lot by lot — those are the parcel questions below. Each card opens that plant's Georgia profile.
Is it too late to plant in Tattnall County?
Usually not — gardeners here simply switch what goes in the ground as the season moves. Cool-season crops can go in from around Jan 18; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Feb 15 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Dec 5 — long-season crops need about 90 days of runway, quick greens only 30. In a climate this gentle, “too late” hardly applies — the question becomes which crops prefer the cooler months ahead.
What gets applied to farmland in Tattnall County
USGS estimates 20,960 lb of Glyphosate on Tattnall County farmland in 2019, its largest by weight, ahead of Malathion (7,178 lb) and Metolachlor-s (6,763 lb).
Farmland across the whole county, not any one lot. Check your address for the site-by-site record.
Safe to Grow Here?
What the federal record shows across Tattnall County — and how to grow with it.
We checked the federal record across Tattnall County — 116 documented sites across 5 of the 9 source types we track.
The most significant on record: 2 Toxics Release Inventory facilities. Active industrial facilities reporting chemical releases to air, water, and land.
The federal record across Tattnall County is a modest one — a typical footprint for a growing area. Nothing here calls for alarm; it's worth knowing which recorded sites sit closest to where you grow, and each one on the map carries its type and location. If one turns out to be a near neighbor, a one-time soil test settles the question.
Sources: EPA, USGS — 1.8M documented sites tracked nationwide across 9 federal source types.
What's on the federal record near Tattnall County
Closest first, across Tattnall County. Listing isn't leaking, and distance isn't exposure.
- JACKIES FOOD STOREUnderground Storage Tanks · 2.7 mi
- TATTNALL CO HIGH SCHOOLPFAS · 3.3 mi
- GA FC-TATTNALL CO UNITUnderground Storage Tanks · 3.4 mi
- GA DOT TATTNALL CO MAINT HQUnderground Storage Tanks · 3.7 mi
- THE DOCTORS HOSPITAL OF TATTNALLUnderground Storage Tanks · 3.8 mi
- DISCOUNT BEVERAGEUnderground Storage Tanks · 4.1 mi
- TATTNALL COUNTY SHOPUnderground Storage Tanks · 4.2 mi
- FUTCH CONVIENCE STOREUnderground Storage Tanks · 4.2 mi
- SOUTHFORK LIQUOR STOREUnderground Storage Tanks · 4.2 mi
- GDC StateUnderground Storage Tanks · 4.3 mi
- GDC RogersUnderground Storage Tanks · 4.3 mi
- SHIRLEY NURSERYUnderground Storage Tanks · 4.3 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Tattnall County'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 Tattnall County.
Total Sites
116
across Tattnall County
Risk Level
Moderate
Highest-severity
2 Toxics Release Inventory facilities
Sources Checked
across Tattnall County
Severity Distribution
across Tattnall County
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Tattnall County, Underground Storage Tanks runs higher than the national average — 97 sites across Tattnall County. Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
Underground Storage Tanks: Underground storage tanks are the single most common source of soil contamination near homes and gardens.
Use raised beds with imported soil — this eliminates the primary soil-contact pathway.
Check your specific parcel in Tattnall County
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 Tattnall County average
Your land is one point inside Tattnall County
Everything above resolves to Tattnall County as a whole — one PHZM band and one county frost record, read across 308K 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 county 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 county average.
Your Lot vs the Tattnall County Average
Tattnall County Average
- ●USDA Zones 9a, averaged across Tattnall County
- ●One soil character for all of Tattnall County
- ●Frost dates read at Tattnall County's scale: Feb 15 to Dec 5
YOUR Parcel
- ✓Your exact zone, not Tattnall County's 9a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your parcel in Tattnall County
Pull a site-specific report for your exact address in Tattnall County, Georgia — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Tattnall County averages can't show:
We read public map data around Tattnall County — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Tattnall County average
How we know this about Tattnall County
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at county grain; hard-freeze dates from NOAA 1991–2020 28°F normals at this county’s own record where one resolves, and the labelled statewide window where none does; soils from the USDA NRCS SSURGO survey, area-weighted across the county’s own map units; boundaries and acreage from US Census TIGER/Line 2025; the contamination and pesticide records from the federal sources named in their beats above. Where Tattnall County carries no record of its own, the figure is inherited and labelled — the resolution ledger below names each.
Common questions about Tattnall County
When does frost risk typically end in Tattnall County?
The last hard freeze (28°F) in Tattnall County typically lands around Feb 15, 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 Mar 8.
How long is the growing season in Tattnall County?
Measured between 28°F hard freezes, Tattnall County sees about 293 frost-free days — roughly Feb 15 through Dec 5, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Mar 8 to Nov 21, about 258 days.
Is the soil safe to grow vegetables in Tattnall County?
The federal record around Tattnall County shows 116 documented sites, mostly Underground Storage Tanks entries (97), the nearest Underground Storage Tanks record about 2.7 miles out — a typical footprint for a growing area, and proximity to a documented site is information, not a diagnosis of any one yard. It's worth seeing which recorded sites sit closest to where you grow, and testing the soil before new food beds near any of them.
Everything above is measured at Tattnall County's scale — its 9a band and its 293-day season. Your yard writes its own version of Tattnall County's numbers: we read soil, sun, drainage and frost at your exact address. Try it for 14 days — no card required.
Will It Grow Here?
Zone fit is the first question — each answer below reads Georgia's frost window, season length, and soil profile against the plant's real requirements.
What this page reads at Tattnall County’s own scale
8 of the readings below were taken at Tattnall County's own scale — its own ~293-day span between 28°F freezes, the 3 most extensive soil series mapped here and 116 documented sites inside its boundary; one is borrowed from a wider read, named and linked below.
Measured here
- Tattnall County's own USDA hardiness band, zones 9aUSDA PHZM 2023
- Tattnall County's own 28°F hard-freeze dates and its ~293-day span between themNOAA 1991–2020 Climate Normals
- The soil order, drainage, surface pH, and the 3 most extensive named soil series mapped in Tattnall CountyUSDA NRCS SSURGO
- 116 documented contamination sites inside the county boundary, distance-sorted from its center — the closest Underground Storage Tanks record about 2.7 miles outFederal environmental registers
- Tattnall County's boundary and the 307,737 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 9a and a ~293-day seasonGrowable Ground crop-matching engine
- The 2 ecoregions Tattnall County spans, Southeastern Plains the largestUS EPA Level III Ecoregions
- Which agricultural compounds go onto Tattnall County farmland, and roughly how muchUSGS NAWQA EPest county estimates
Inherited from a wider read
- The growing challenges every Georgia grower plans around — written at state scale, so they stay on the state guidefrom Georgia
What this page can’t tell you
- How the season shifts across Tattnall County — the ~293 days above is one reading at its centre; the 12 towns below each carry their owntowns in this county →
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Tattnall County's 307,737 acreswhy one lot differs from the next →
- Which of those 116 documented sites actually reaches your soil — that needs your address, the wind, and the groundwater directionhow we read the record →
- Where cold air settles, which slopes face the sun, and which way the wind runs on your own ground — none of it survives being averaged over Tattnall Countyread your own land →