Riverdale, 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.
Expect cabbage, fig, california poppy, and collard greens to be strong candidates here; the deciding factors on any one parcel stay local — soil, sun, and drainage.
Even in Riverdale, 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 Riverdale 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 Riverdale — soil, climate, flood, and parcel records. How we handle your address.
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Riverdale — the short answer
Riverdale, Georgia: USDA zone 8b, about 272 days between hard freezes, across 3K acres of city.
- USDA zone
- 8b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 3
- Clayton County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Nov 30
- Clayton County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~272
- Clayton 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 Clayton County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 8b is Riverdale's average, not your lot's — a low corner or a tree line moves it. Against Riverdale's 272-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Riverdale
Each reading below is measured for Riverdale itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsRiverdale runs about 272 days between hard freezes (read from Clayton County, the closest normal to Riverdale) — 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
MeasuredRiverdale 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 Riverdale is in
Riverdale sits in the Piedmont — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Riverdale's own centroid rather than borrowed from Clayton County.
What Grows in Riverdale
Every plant below cleared Riverdale's own zone 8b and its 272-day season. Each card opens that plant's Georgia profile. How we score.
Is it too late to plant in Riverdale?
Too late for some crops, right on time for others — a growing season is a sequence, not a deadline. Cool-season crops can go in from around Feb 3; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 3 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 30 — 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 Riverdale
Closest first, within ~10 miles of Riverdale. Listing isn't leaking, and distance isn't exposure.
- PEP BOYS #112Underground Storage Tanks · 700 ft
- CVS PHARMACY #GARIV1B01Brownfields · 750 ft
- W MAX SMITH INCUnderground Storage Tanks · 750 ft
- WAL-MART SUPERCENTER #787Brownfields · 850 ft
- CITGO (CLOSED)Underground Storage Tanks · 850 ft
- HOME DEPOT STORE #178Brownfields · 1100 ft
- FLOWERS THRIFT STORE & WHSEUnderground Storage Tanks · 1400 ft
- INTERSTATE RIVERDALEUnderground Storage Tanks · 1400 ft
- TEXACOUnderground Storage Tanks · 1400 ft
- SINGLE SOURCE, INCBrownfields · 1500 ft
- KROGER GA-319Underground Storage Tanks · 1600 ft
- KROGER 011-0319Brownfields · 1800 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Riverdale'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 Riverdale.
Total Sites
1,590
within ~10 miles of Riverdale
Risk Level
Elevated
Highest-severity
39 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Riverdale
Severity Distribution
within ~10 miles of Riverdale
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Riverdale, two things run higher than the national average within ~10 miles of Riverdale — Superfund (39 sites) and Underground Storage Tanks (1,127 sites). It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
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 Riverdale
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 Riverdale average
Your land is one point inside Riverdale
Everything above resolves to Riverdale as a whole — one PHZM band, read across 3K acres, with hard-freeze dates borrowed from Clayton 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 Riverdale Average
Riverdale Average
- ●USDA Zones 8b, averaged across Riverdale
- ●One soil character for all of Riverdale
- ●Frost dates read at Riverdale's scale: Mar 3 to Nov 30
YOUR Parcel
- ✓Your exact zone, not Riverdale's 8b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Riverdale
Pull a site-specific report for your exact address in Riverdale, Georgia — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Riverdale averages can't show:
We read public map data around Riverdale — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Riverdale average
How we know this about Riverdale
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 Clayton 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 Riverdale
When does frost risk typically end in Riverdale?
The last hard freeze (28°F) in Riverdale typically lands around Mar 3, 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 24.
When is the first frost in Riverdale?
The first hard freeze (28°F) in Riverdale typically arrives around Nov 30, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 16, so the watching starts about Oct 31 — about 272 days after the spring freeze cleared.
How long is the growing season in Riverdale?
Measured between 28°F hard freezes, Riverdale sees about 272 frost-free days — roughly Mar 3 through Nov 30, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Mar 24 to Nov 16, about 237 days.
Is the soil safe to grow vegetables in Riverdale?
The federal record around Riverdale is a meaningful one — 1,590 documented sites, mostly Underground Storage Tanks entries (1,127), 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 Riverdale?
From about Oct 31 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 30 (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 30. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Riverdale's scale — its 8b band and its 272-day season. Your yard writes its own version of Riverdale'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 Riverdale’s own scale
5 of the readings below were taken at Riverdale's own scale — the 2,810 acres it covers and 1,590 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Riverdale's own USDA hardiness band, zones 8bUSDA PHZM 2023
- 1,590 documented contamination sites on the federal record near Riverdale, the closest Underground Storage Tanks record about 0.1 miles out from the town centreFederal environmental registers
- Riverdale's boundary and the 2,810 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8b and a ~272-day seasonGrowable Ground crop-matching engine
- The ecoregion at Riverdale's own centroid, the PiedmontUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Riverdale has no normal of its own, so its county's is the closest measured readfrom Clayton County
- Soil character — no town-scale survey exists, so Riverdale's 2,810 acres read through its county's SSURGO summaryfrom Clayton County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Clayton 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 Clayton County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Riverdale's 2,810 acreswhy one lot differs from the next →
- Which side of Riverdale you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 2,810 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 Riverdale-wide figureread your own land →
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