Decatur, Georgia, sits in USDA hardiness zone 8a — a zone band wide enough that plant choice, not possibility, is the interesting question.
Reliable performers under these conditions include cabbage, fig, california poppy, and collard greens; what your own ground favors still comes down to its soil, sun, and drainage.
Even in Decatur, 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 Decatur 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 Decatur — soil, climate, flood, and parcel records. How we handle your address.
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Decatur — the short answer
Decatur, Georgia: USDA zone 8a, about 269 days between hard freezes, across 3K acres of city.
- USDA zone
- 8a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 5
- DeKalb County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Nov 29
- DeKalb County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~269
- DeKalb County normal — NOAA 1991–2020, nearest to this town
- City area
- 3K 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 DeKalb County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 8a is Decatur's average, not your lot's — a low corner or a tree line moves it. Against Decatur's 269-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Decatur
Each reading below is measured for Decatur itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsDecatur runs about 269 days between hard freezes (read from DeKalb County, the closest normal to Decatur) — 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
MeasuredDecatur sits in USDA hardiness zone 8a.
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 Decatur is in
Decatur sits in the Piedmont — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Decatur's own centroid rather than borrowed from DeKalb County.
What Grows in Decatur
Every plant below cleared Decatur's own zone 8a and its 269-day season. Each card opens that plant's Georgia profile. How we score.
Is it too late to plant in Decatur?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Feb 5; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 5 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 29 — 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's on the federal record near Decatur
Closest first, within ~10 miles of Decatur. Listing isn't leaking, and distance isn't exposure.
- FORMER DEWEY KING BP STATIONUnderground Storage Tanks · 700 ft
- HARDEES/FORMER SHELLUnderground Storage Tanks · 800 ft
- CALLAWAY SQUARE BUILDING GENERATORUnderground Storage Tanks · 1100 ft
- DEKALB COUNTY GOVT/COURTHOUSE GEUnderground Storage Tanks · 1100 ft
- J & H SERVICE CENTERUnderground Storage Tanks · 1400 ft
- DEKALB COUNTY CALLAWAYUnderground Storage Tanks · 1400 ft
- AAMCO TRANSMISSIONUnderground Storage Tanks · 1700 ft
- FUNB DECATUR MAIN BRANCH GA0328Underground Storage Tanks · 1800 ft
- MEN WITH GASUnderground Storage Tanks · 1800 ft
- WALTER T AUSTINUnderground Storage Tanks · 1800 ft
- KAISER PERMANENTE DECATUR MEDICAL OFFICESBrownfields · 1800 ft
- CVS PHARMACY #2367Brownfields · 1900 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Decatur'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 Decatur.
Sources Checked
within ~10 miles of Decatur
Severity Distribution
within ~10 miles of Decatur
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Decatur, two things run higher than the national average within ~10 miles of Decatur — Superfund (70 sites) and Underground Storage Tanks (2,205 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 Decatur
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 Decatur average
Your land is one point inside Decatur
Everything above resolves to Decatur as a whole — one PHZM band, read across 3K acres, with hard-freeze dates borrowed from DeKalb 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 Decatur Average
Decatur Average
- ●USDA Zones 8a, averaged across Decatur
- ●One soil character for all of Decatur
- ●Frost dates read at Decatur's scale: Mar 5 to Nov 29
YOUR Parcel
- ✓Your exact zone, not Decatur's 8a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Decatur
Pull a site-specific report for your exact address in Decatur, Georgia — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Decatur averages can't show:
We read public map data around Decatur — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Decatur average
How we know this about Decatur
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 DeKalb 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 Decatur
When does frost risk typically end in Decatur?
The last hard freeze (28°F) in Decatur typically lands around Mar 5, 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 26.
When is the first frost in Decatur?
The first hard freeze (28°F) in Decatur typically arrives around Nov 29, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 15, so the watching starts about Oct 30 — about 269 days after the spring freeze cleared.
How long is the growing season in Decatur?
Measured between 28°F hard freezes, Decatur sees about 269 frost-free days — roughly Mar 5 through Nov 29, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Mar 26 to Nov 15, about 234 days.
Is the soil safe to grow vegetables in Decatur?
The federal record around Decatur is a meaningful one — 3,028 documented sites, mostly Underground Storage Tanks entries (2,205), 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 Decatur?
From about Oct 30 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 Nov 29 (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 Nov 29. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Decatur's scale — its 8a band and its 269-day season. Your yard writes its own version of Decatur'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 Decatur’s own scale
5 of the readings below were taken at Decatur's own scale — the 2,948 acres it covers and 3,028 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Decatur's own USDA hardiness band, zones 8aUSDA PHZM 2023
- 3,028 documented contamination sites on the federal record near Decatur, the closest Underground Storage Tanks record about 0.1 miles out from the town centreFederal environmental registers
- Decatur's boundary and the 2,948 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8a and a ~269-day seasonGrowable Ground crop-matching engine
- The ecoregion at Decatur's own centroid, the PiedmontUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Decatur has no normal of its own, so its county's is the closest measured readfrom DeKalb County
- Soil character — no town-scale survey exists, so Decatur's 2,948 acres read through its county's SSURGO summaryfrom DeKalb County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom DeKalb 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 DeKalb County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Decatur's 2,948 acreswhy one lot differs from the next →
- Which side of Decatur you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 2,948 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 Decatur-wide figureread your own land →
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