Rock Mills, 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.
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 Rock Mills, 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 Rock Mills 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 Rock Mills — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Rock Mills — the short answer
Rock Mills, Alabama: USDA zone 8a, about 240 days between hard freezes, across 4K acres of town.
- USDA zone
- 8a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 19
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 14
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~240
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 4K acres
- US Census TIGER/Line 2025
Every figure names the dataset it came from. Hard-freeze dates are this town’s own 28°F normals: light frosts run a few weeks past them, and tender transplants usually wait 2–3 weeks after the last hard freeze.
Hardiness Zone Range
Zone 8a is Rock Mills's average, not your lot's — a low corner or a tree line moves it. Against Rock Mills's 240-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Rock Mills
Each reading below is measured for Rock Mills itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredRock Mills runs about 240 days between hard freezes — a long growing season.
There is slack for succession plantings and slow-finishing crops: many vegetables can be sown twice, and the heat-lovers have time to ripen fully.
Plan a second sowing of quick crops after the first comes out, and use the fall window most gardeners let sit idle.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredRock Mills 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 Rock Mills is in
Rock Mills sits in the Piedmont — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Rock Mills's own centroid rather than borrowed from Randolph County.
What Grows in Rock Mills
Every plant below cleared Rock Mills's own zone 8a and its 240-day season. Each card opens that plant's Alabama profile. How we score.
Is it too late to plant in Rock Mills?
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 19; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 19 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 14 — long-season crops need about 90 days of runway, quick greens only 30. Here the season winds down slowly: late sowings, a real autumn harvest, and garlic in the ground before the first hard freeze.
What's on the federal record near Rock Mills
Closest first, within ~10 miles of Rock Mills. Listing isn't leaking, and distance isn't exposure.
- WEHADKEE YARN MILLS ROCK MILLS DIVISIONToxics Release Inventory · 2300 ft
- J & L COUNTRY STORE #44Underground Storage Tanks · 2600 ft
- SMITH GROCERYUnderground Storage Tanks · 0.5 mi
- ROCK MILLS ELEMENTARY SCHOOLUnderground Storage Tanks · 0.9 mi
- DOUBLE S FARMCAFO · 1.8 mi
- SHAKE & BAKE FARMCAFO · 2.0 mi
- ROCK MILLS FARMCAFO · 2.1 mi
- RUSHTON FARMCAFO · 2.6 mi
- TRIPLE J FARMCAFO · 2.6 mi
- NANCY DO FARMCAFO · 3.1 mi
- HERITAGE FARM LLCCAFO · 3.2 mi
- PATEL FOOD MART #2Underground Storage Tanks · 3.2 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Rock Mills'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 Rock Mills.
Total Sites
98
within ~10 miles of Rock Mills
Risk Level
Moderate
Highest-severity
5 Toxics Release Inventory facilities
Sources Checked
within ~10 miles of Rock Mills
Severity Distribution
within ~10 miles of Rock Mills
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Rock Mills, two things run higher than the national average within ~10 miles of Rock Mills — CAFO (15 sites) and Underground Storage Tanks (67 sites). Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
CAFO: CAFOs pose a different contamination profile than chemical sources.
Underground Storage Tanks: Underground storage tanks are the single most common source of soil contamination near homes and gardens.
Wash all produce consumed raw thoroughly, especially leafy greens grown near CAFOs.
Use raised beds with imported soil — this eliminates the primary soil-contact pathway.
Check your specific parcel in Rock Mills
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 Rock Mills average
Your land is one point inside Rock Mills
Everything above resolves to Rock Mills as a whole — one PHZM band and one 28°F frost record, read across 4K acres. 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 Rock Mills Average
Rock Mills Average
- ●USDA Zones 8a, averaged across Rock Mills
- ●One soil character for all of Rock Mills
- ●Frost dates read at Rock Mills's scale: Mar 19 to Nov 14
YOUR Parcel
- ✓Your exact zone, not Rock Mills's 8a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Rock Mills
Pull a site-specific report for your exact address in Rock Mills, Alabama — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Rock Mills averages can't show:
We read public map data around Rock Mills — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Rock Mills average
How we know this about Rock Mills
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 Rock Mills’s own record; 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 Rock Mills
When does frost risk typically end in Rock Mills?
The last hard freeze (28°F) in Rock Mills typically lands around Mar 19, 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 Apr 9.
When is the first frost in Rock Mills?
The first hard freeze (28°F) in Rock Mills typically arrives around Nov 14, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 31, so the watching starts about Oct 15 — about 240 days after the spring freeze cleared.
How long is the growing season in Rock Mills?
Measured between 28°F hard freezes, Rock Mills sees about 240 frost-free days — roughly Mar 19 through Nov 14, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 9 to Oct 31, about 205 days.
Is the soil safe to grow vegetables in Rock Mills?
The federal record around Rock Mills shows 98 documented sites, mostly Underground Storage Tanks entries (67), the nearest Toxics Release Inventory record about 0.4 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 Rock Mills?
From about Oct 15 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 14 (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 14. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Rock Mills's scale — its 8a band and its 240-day season. Your yard writes its own version of Rock Mills'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 Rock Mills’s own scale
6 of the readings below were taken at Rock Mills's own scale — its own ~240-day season between 28°F freezes, the 4,048 acres it covers and 98 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Rock Mills's own USDA hardiness band, zones 8aUSDA PHZM 2023
- Rock Mills's own 28°F hard-freeze dates, about Mar 19 and Nov 14 and the ~240-day span between themNOAA 1991–2020 Climate Normals
- 98 documented contamination sites on the federal record near Rock Mills, the closest Toxics Release Inventory record about 0.4 miles out from the town centreFederal environmental registers
- Rock Mills's boundary and the 4,048 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8a and a ~240-day seasonGrowable Ground crop-matching engine
- The ecoregion at Rock Mills's own centroid, the PiedmontUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Rock Mills's 4,048 acres read through its county's SSURGO summaryfrom Randolph County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Randolph 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 Randolph County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Rock Mills's 4,048 acreswhy one lot differs from the next →
- Which side of Rock Mills you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 4,048 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Toxics Release Inventory record about 0.4 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 Rock Mills-wide figureread your own land →
More in Alabama
Growing region
Nearby growing guides