Siloam, Georgia, sits in USDA hardiness zone 8b — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
Among the crops suited to this profile: cabbage, fig, california poppy, and collard greens. The site-level story — soil, sun, drainage — decides the rest.
Even in Siloam, 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 Siloam 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 Siloam — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Siloam — the short answer
Siloam, Georgia: USDA zone 8b, about 268 days between hard freezes, across 777 acres of town.
- USDA zone
- 8b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 3
- Greene County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Nov 26
- Greene County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~268
- Greene County normal — NOAA 1991–2020, nearest to this town
- Town area
- 777 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 Greene County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 8b is Siloam's average, not your lot's — a low corner or a tree line moves it. Against Siloam's 268-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Siloam
Each reading below is measured for Siloam itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsSiloam runs about 268 days between hard freezes (read from Greene County, the closest normal to Siloam) — 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
MeasuredSiloam 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 Siloam is in
Siloam sits in the Piedmont — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Siloam's own centroid rather than borrowed from Greene County.
What Grows in Siloam
Every plant below cleared Siloam's own zone 8b and its 268-day season. Each card opens that plant's Georgia profile. How we score.
Is it too late to plant in Siloam?
Rarely: the season closes in stages, not all at once, and each stage has its crops. 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 26 — 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 Siloam
Closest first, within ~10 miles of Siloam. Listing isn't leaking, and distance isn't exposure.
- SILOAM BP AMOCOUnderground Storage Tanks · 1400 ft
- THE FELDSPAR CORPUnderground Storage Tanks · 1800 ft
- KAHN BROS FOOD STORE METRO FOOD STOREUnderground Storage Tanks · 1900 ft
- CONLEY AMOCOUnderground Storage Tanks · 2000 ft
- SANDY MARTUnderground Storage Tanks · 2500 ft
- C L RHODESUnderground Storage Tanks · 1.2 mi
- 21CC21Nitrate · 1.9 mi
- 21CC02Nitrate · 2.5 mi
- GREENSBORO TRICHLOROACETALDEHYE SPILLSuperfund · 2.7 mi
- WEBB GROCERYUnderground Storage Tanks · 4.4 mi
- STANSELL COMMUNITY STORESUnderground Storage Tanks · 4.4 mi
- GA PACIFICUnderground Storage Tanks · 4.7 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Siloam'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 Siloam.
Total Sites
97
within ~10 miles of Siloam
Risk Level
Elevated
Highest-severity
1 Superfund site (none NPL-listed)
Sources Checked
within ~10 miles of Siloam
Severity Distribution
within ~10 miles of Siloam
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Siloam, Underground Storage Tanks runs higher than the national average — 76 sites within ~10 miles of Siloam. It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
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 Siloam
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 Siloam average
Your land is one point inside Siloam
Everything above resolves to Siloam as a whole — one PHZM band, read across 777 acres, with hard-freeze dates borrowed from Greene County’s record because no 30-year normal resolves at this town’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 town 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 Siloam Average
Siloam Average
- ●USDA Zones 8b, averaged across Siloam
- ●One soil character for all of Siloam
- ●Frost dates read at Siloam's scale: Mar 3 to Nov 26
YOUR Parcel
- ✓Your exact zone, not Siloam's 8b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Siloam
Pull a site-specific report for your exact address in Siloam, Georgia — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Siloam averages can't show:
We read public map data around Siloam — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Siloam average
How we know this about Siloam
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at this town’s own centroid; hard-freeze dates from NOAA 1991–2020 28°F normals at Greene 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 town grain anywhere on this page — there is no town-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 Siloam
When does frost risk typically end in Siloam?
The last hard freeze (28°F) in Siloam 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 Siloam?
The first hard freeze (28°F) in Siloam typically arrives around Nov 26, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 12, so the watching starts about Oct 27 — about 268 days after the spring freeze cleared.
How long is the growing season in Siloam?
Measured between 28°F hard freezes, Siloam sees about 268 frost-free days — roughly Mar 3 through Nov 26, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Mar 24 to Nov 12, about 233 days.
Is the soil safe to grow vegetables in Siloam?
The federal record around Siloam is a meaningful one — 97 documented sites, mostly Underground Storage Tanks entries (76), the nearest Underground Storage Tanks record about 0.3 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 Siloam?
From about Oct 27 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 26 (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 26. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Siloam's scale — its 8b band and its 268-day season. Your yard writes its own version of Siloam'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 Siloam’s own scale
5 of the readings below were taken at Siloam's own scale — the 777 acres it covers and 97 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Siloam's own USDA hardiness band, zones 8bUSDA PHZM 2023
- 97 documented contamination sites on the federal record near Siloam, the closest Underground Storage Tanks record about 0.3 miles out from the town centreFederal environmental registers
- Siloam's boundary and the 777 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8b and a ~268-day seasonGrowable Ground crop-matching engine
- The ecoregion at Siloam's own centroid, the PiedmontUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Siloam has no normal of its own, so its county's is the closest measured readfrom Greene County
- Soil character — no town-scale survey exists, so Siloam's 777 acres read through its county's SSURGO summaryfrom Greene County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Greene 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 Greene County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Siloam's 777 acreswhy one lot differs from the next →
- Which side of Siloam you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 777 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.3 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 Siloam-wide figureread your own land →
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