Twin City, Georgia, sits in USDA hardiness zone 8b — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
These conditions suit cabbage, fig, california poppy, and collard greens — a starting list any specific site will trim or extend with its own soil, sun, and drainage.
Even in Twin City, 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 Twin City 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 Twin City — soil, climate, flood, and parcel records. How we handle your address.
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Twin City — the short answer
Twin City, Georgia: USDA zone 8b, about 290 days between hard freezes, across 2K acres of city.
- USDA zone
- 8b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Feb 20
- Emanuel County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Dec 7
- Emanuel County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~290
- Emanuel County normal — NOAA 1991–2020, nearest to this town
- City area
- 2K acres
- US Census TIGER/Line 2025
Every figure names the dataset it came from. No 30-year normal resolves at this town’s own centroid, so the hard-freeze dates are Emanuel County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 8b is Twin City's average, not your lot's — a low corner or a tree line moves it. Against Twin City's 290-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Twin City
Each reading below is measured for Twin City itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsTwin City runs about 290 days between hard freezes (read from Emanuel County, the closest normal to Twin City) — 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
Winter hardiness
MeasuredTwin City sits in USDA hardiness zone 8b.
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 Twin City is in
Twin City sits in the Southeastern Plains — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Twin City's own centroid rather than borrowed from Emanuel County.
What Grows in Twin City
Every plant below cleared Twin City's own zone 8b and its 290-day season. Each card opens that plant's Georgia profile. How we score.
Is it too late to plant in Twin City?
Usually not — gardeners here simply switch what goes in the ground as the season moves. Cool-season crops can go in from around Jan 23; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Feb 20 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Dec 7 — long-season crops need about 90 days of runway, quick greens only 30. Here the calendar nearly circles: cool-season crops take the winter shift, and the next window is always close.
What's on the federal record near Twin City
Closest first, within ~10 miles of Twin City. Listing isn't leaking, and distance isn't exposure.
- GEORGE L SMITH II STATE PARKUnderground Storage Tanks · 750 ft
- ANDERSON GULFUnderground Storage Tanks · 750 ft
- GA DOT #10282 OLD TWIN CITY MAINUnderground Storage Tanks · 750 ft
- TWIN CITY KWIK PIKUnderground Storage Tanks · 950 ft
- HALLS MINIT MARTUnderground Storage Tanks · 1000 ft
- MONEYSAVERUnderground Storage Tanks · 1100 ft
- HOLDENS SERVICE CENTERUnderground Storage Tanks · 1400 ft
- TWIN CITY PRIMARY SCHOOLUnderground Storage Tanks · 1500 ft
- 28U001Nitrate · 1700 ft
- SINGH FOOD MARTUnderground Storage Tanks · 0.5 mi
- CITY MARKETUnderground Storage Tanks · 0.8 mi
- MOORE SVC STATIONUnderground Storage Tanks · 1.5 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Twin City'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 Twin City.
Total Sites
69
within ~10 miles of Twin City
Risk Level
Elevated
Highest-severity
3 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Twin City
Severity Distribution
within ~10 miles of Twin City
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Twin City, two things run higher than the national average within ~10 miles of Twin City — Superfund (3 sites) and Underground Storage Tanks (47 sites). Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
Superfund: Superfund sites represent the most severe contamination in the federal system.
Underground Storage Tanks: Underground storage tanks are the single most common source of soil contamination near homes and gardens.
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Use raised beds with imported soil — this eliminates the primary soil-contact pathway.
Check your specific parcel in Twin City
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 Twin City average
Your land is one point inside Twin City
Everything above resolves to Twin City as a whole — one PHZM band, read across 2K acres, with hard-freeze dates borrowed from Emanuel County’s record because no 30-year normal resolves at this city’s own centroid. 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 city 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 Twin City Average
Twin City Average
- ●USDA Zones 8b, averaged across Twin City
- ●One soil character for all of Twin City
- ●Frost dates read at Twin City's scale: Feb 20 to Dec 7
YOUR Parcel
- ✓Your exact zone, not Twin City's 8b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Twin City
Pull a site-specific report for your exact address in Twin City, Georgia — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Twin City averages can't show:
We read public map data around Twin City — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Twin City average
How we know this about Twin City
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at this city’s own centroid; hard-freeze dates from NOAA 1991–2020 28°F normals at Emanuel County’s record, because none resolves here; 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 city grain anywhere on this page — there is no city-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 Twin City
When does frost risk typically end in Twin City?
The last hard freeze (28°F) in Twin City typically lands around Feb 20, 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 13.
When is the first frost in Twin City?
The first hard freeze (28°F) in Twin City typically arrives around Dec 7, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 23, so the watching starts about Nov 7 — about 290 days after the spring freeze cleared.
How long is the growing season in Twin City?
Measured between 28°F hard freezes, Twin City sees about 290 frost-free days — roughly Feb 20 through Dec 7, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Mar 13 to Nov 23, about 255 days.
Is the soil safe to grow vegetables in Twin City?
The federal record around Twin City is a meaningful one — 69 documented sites, mostly Underground Storage Tanks entries (47), the nearest Underground Storage Tanks 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 Twin City?
From about Nov 7 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 Dec 7 (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 Dec 7. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Twin City's scale — its 8b band and its 290-day season. Your yard writes its own version of Twin City'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 Twin City’s own scale
5 of the readings below were taken at Twin City's own scale — the 2,287 acres it covers and 69 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Twin City's own USDA hardiness band, zones 8bUSDA PHZM 2023
- 69 documented contamination sites on the federal record near Twin City, the closest Underground Storage Tanks record about 0.1 miles out from the town centreFederal environmental registers
- Twin City's boundary and the 2,287 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8b and a ~290-day seasonGrowable Ground crop-matching engine
- The ecoregion at Twin City's own centroid, the Southeastern PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Twin City has no normal of its own, so its county's is the closest measured readfrom Emanuel County
- Soil character — no town-scale survey exists, so Twin City's 2,287 acres read through its county's SSURGO summaryfrom Emanuel County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Emanuel County
- The growing challenges every Georgia grower plans around — written at state scale, so they stay on the state guidefrom Georgia
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Emanuel County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Twin City's 2,287 acreswhy one lot differs from the next →
- Which side of Twin City you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 2,287 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks 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 Twin City-wide figureread your own land →
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