Thorsby, Alabama, sits in USDA hardiness zone 8a — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
Growers here do well with cabbage, fig, california poppy, and collard greens — with the usual caveat that any single yard's soil, sun, and drainage cast the deciding vote.
Even in Thorsby, 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 Thorsby 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 Thorsby — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Thorsby — the short answer
Thorsby, Alabama: USDA zone 8a, about 264 days between hard freezes, across 4K acres of city.
- USDA zone
- 8a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 6
- Chilton County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Nov 25
- Chilton County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~264
- Chilton County normal — NOAA 1991–2020, nearest to this town
- City area
- 4K 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 Chilton County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 8a is Thorsby's average, not your lot's — a low corner or a tree line moves it. Against Thorsby's 264-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Thorsby
Each reading below is measured for Thorsby itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsThorsby runs about 264 days between hard freezes (read from Chilton County, the closest normal to Thorsby) — 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
MeasuredThorsby 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 Thorsby is in
Thorsby sits in the Southeastern Plains — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Thorsby's own centroid rather than borrowed from Chilton County.
What Grows in Thorsby
Every plant below cleared Thorsby's own zone 8a and its 264-day season. Each card opens that plant's Alabama profile. How we score.
Is it too late to plant in Thorsby?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Feb 6; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 6 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 25 — long-season crops need about 90 days of runway, quick greens only 30. And with a calendar this mild, the honest answer is that planting barely stops — winter opens seasons colder regions never see.
What's on the federal record near Thorsby
Closest first, within ~10 miles of Thorsby. Listing isn't leaking, and distance isn't exposure.
- STATE OF ALABAMA FORESTRY COMMISSIONUnderground Storage Tanks · 1400 ft
- THORSBY SCHOOLBrownfields · 1500 ft
- THORSBY ONE STOPUnderground Storage Tanks · 1500 ft
- THORSBY HIGH SCHOOLUnderground Storage Tanks · 1600 ft
- ROBINSON GARAGEUnderground Storage Tanks · 2100 ft
- TOWN OF THORSBYUnderground Storage Tanks · 2100 ft
- MAIN STREET MARKETUnderground Storage Tanks · 2300 ft
- CONTINENTAL TELEPHONE OF THE SOUTHUnderground Storage Tanks · 0.9 mi
- DISTRICT 2 SHOPUnderground Storage Tanks · 1.1 mi
- BOISE CASCADE WOOD PRODUCTS, LLC - THORSBY EWPBrownfields · 1.3 mi
- BOISE CASCADE WOOD PRODUCTS, LLC-THORSBY ENGINEERED WOOD PRODUCTSToxics Release Inventory · 1.3 mi
- BOISE CASCADE WOOD PRODUCTS, LLC - THORSBY EWPToxics Release Inventory · 1.3 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Thorsby'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 Thorsby.
Total Sites
174
within ~10 miles of Thorsby
Risk Level
Moderate
Highest-severity
4 Toxics Release Inventory facilities
Sources Checked
within ~10 miles of Thorsby
Severity Distribution
within ~10 miles of Thorsby
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Thorsby, Underground Storage Tanks runs higher than the national average — 134 sites within ~10 miles of Thorsby. That's not a problem with your land — it's information about 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 Thorsby
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 Thorsby average
Your land is one point inside Thorsby
Everything above resolves to Thorsby as a whole — one PHZM band, read across 4K acres, with hard-freeze dates borrowed from Chilton 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 Thorsby Average
Thorsby Average
- ●USDA Zones 8a, averaged across Thorsby
- ●One soil character for all of Thorsby
- ●Frost dates read at Thorsby's scale: Mar 6 to Nov 25
YOUR Parcel
- ✓Your exact zone, not Thorsby's 8a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Thorsby
Pull a site-specific report for your exact address in Thorsby, Alabama — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Thorsby averages can't show:
We read public map data around Thorsby — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Thorsby average
How we know this about Thorsby
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 Chilton 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 Thorsby
When does frost risk typically end in Thorsby?
The last hard freeze (28°F) in Thorsby typically lands around Mar 6, 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 27.
When is the first frost in Thorsby?
The first hard freeze (28°F) in Thorsby typically arrives around Nov 25, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 11, so the watching starts about Oct 26 — about 264 days after the spring freeze cleared.
How long is the growing season in Thorsby?
Measured between 28°F hard freezes, Thorsby sees about 264 frost-free days — roughly Mar 6 through Nov 25, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Mar 27 to Nov 11, about 229 days.
Is the soil safe to grow vegetables in Thorsby?
The federal record around Thorsby shows 174 documented sites, mostly Underground Storage Tanks entries (134), the nearest Underground Storage Tanks record about 0.3 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.
How do I protect my plants from frost in Thorsby?
From about Oct 26 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 25 (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 25. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Thorsby's scale — its 8a band and its 264-day season. Your yard writes its own version of Thorsby'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 Thorsby’s own scale
5 of the readings below were taken at Thorsby's own scale — the 3,731 acres it covers and 174 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Thorsby's own USDA hardiness band, zones 8aUSDA PHZM 2023
- 174 documented contamination sites on the federal record near Thorsby, the closest Underground Storage Tanks record about 0.3 miles out from the town centreFederal environmental registers
- Thorsby's boundary and the 3,731 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8a and a ~264-day seasonGrowable Ground crop-matching engine
- The ecoregion at Thorsby's own centroid, the Southeastern PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Thorsby has no normal of its own, so its county's is the closest measured readfrom Chilton County
- Soil character — no town-scale survey exists, so Thorsby's 3,731 acres read through its county's SSURGO summaryfrom Chilton County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Chilton County
- The growing challenges every Alabama grower plans around — written at state scale, so they stay on the state guidefrom Alabama
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Chilton County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Thorsby's 3,731 acreswhy one lot differs from the next →
- Which side of Thorsby you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 3,731 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 Thorsby-wide figureread your own land →
More in Alabama
Wider growing context
What grows across AlabamaThorsby sits outside our named growing regions, so Alabama as a whole is its closest context here.
Nearby growing guides