Cardiff, Alabama, sits in USDA hardiness zone 8a — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
The conditions favor cabbage, fig, california poppy, and collard greens, among others — though every individual site edits that list with its own soil, sun, and drainage.
Even in Cardiff, 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 Cardiff 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 Cardiff — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Cardiff — the short answer
Cardiff, Alabama: USDA zone 8a, about 270 days between hard freezes, across 134 acres of town.
- USDA zone
- 8a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 2
- Jefferson County normal — NOAA 1991–2020, nearest to this town
- First hard freeze (28°F)
- Nov 27
- Jefferson County normal — NOAA 1991–2020, nearest to this town
- Days between freezes
- ~270
- Jefferson County normal — NOAA 1991–2020, nearest to this town
- Town area
- 134 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 Jefferson County’s — the closest measured record, labelled as such rather than passed off as local.
Hardiness Zone Range
Zone 8a is Cardiff's average, not your lot's — a low corner or a tree line moves it. Against Cardiff's 270-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Cardiff
Each reading below is measured for Cardiff itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsCardiff runs about 270 days between hard freezes (read from Jefferson County, the closest normal to Cardiff) — 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
MeasuredCardiff 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 Cardiff is in
Cardiff sits in the Southwestern Appalachians — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Cardiff's own centroid rather than borrowed from Jefferson County.
What Grows in Cardiff
Every plant below cleared Cardiff's own zone 8a and its 270-day season. Each card opens that plant's Alabama profile. How we score.
Is it too late to plant in Cardiff?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Feb 2; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 2 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 27 — 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 Cardiff
Closest first, within ~10 miles of Cardiff. Listing isn't leaking, and distance isn't exposure.
- TOWN OF BROOKSIDEUnderground Storage Tanks · 1.0 mi
- GRAYSVILLE BPUnderground Storage Tanks · 1.0 mi
- MOUNTAIN VIEW GOLF COURSEUnderground Storage Tanks · 1.1 mi
- NOLANS CAROUSELUnderground Storage Tanks · 1.4 mi
- NEBO MINEUnderground Storage Tanks · 1.5 mi
- M & M TIRE AND MECHANICAL INCBrownfields · 2.0 mi
- GRAYSVILLE TRUCKING COUnderground Storage Tanks · 2.4 mi
- SOUTH CENTRAL - GYVLALAPUnderground Storage Tanks · 2.4 mi
- BUSBY TRUCKING CO INCUnderground Storage Tanks · 2.5 mi
- PRUDES CREEK WWTPUnderground Storage Tanks · 2.7 mi
- GRAYSVILLE MAIN - 11524Underground Storage Tanks · 2.8 mi
- GRAYSVILLE FOOD STOREUnderground Storage Tanks · 2.8 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Cardiff'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 Cardiff.
Sources Checked
within ~10 miles of Cardiff
Severity Distribution
within ~10 miles of Cardiff
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Cardiff, two things run higher than the national average within ~10 miles of Cardiff — Superfund (16 sites) and Underground Storage Tanks (342 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 Cardiff
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 Cardiff average
Your land is one point inside Cardiff
Everything above resolves to Cardiff as a whole — one PHZM band, read across 134 acres, with hard-freeze dates borrowed from Jefferson 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 Cardiff Average
Cardiff Average
- ●USDA Zones 8a, averaged across Cardiff
- ●One soil character for all of Cardiff
- ●Frost dates read at Cardiff's scale: Mar 2 to Nov 27
YOUR Parcel
- ✓Your exact zone, not Cardiff's 8a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Cardiff
Pull a site-specific report for your exact address in Cardiff, Alabama — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Cardiff averages can't show:
We read public map data around Cardiff — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Cardiff average
How we know this about Cardiff
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 Jefferson 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 Cardiff
When does frost risk typically end in Cardiff?
The last hard freeze (28°F) in Cardiff typically lands around Mar 2, 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 23.
When is the first frost in Cardiff?
The first hard freeze (28°F) in Cardiff typically arrives around Nov 27, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Nov 13, so the watching starts about Oct 28 — about 270 days after the spring freeze cleared.
How long is the growing season in Cardiff?
Measured between 28°F hard freezes, Cardiff sees about 270 frost-free days — roughly Mar 2 through Nov 27, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Mar 23 to Nov 13, about 235 days.
Is the soil safe to grow vegetables in Cardiff?
The federal record around Cardiff is a meaningful one — 535 documented sites, mostly Underground Storage Tanks entries (342), the nearest Underground Storage Tanks record about 1.0 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 Cardiff?
From about Oct 28 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 27 (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 27. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Cardiff's scale — its 8a band and its 270-day season. Your yard writes its own version of Cardiff'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 Cardiff’s own scale
5 of the readings below were taken at Cardiff's own scale — the 134 acres it covers and 535 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Cardiff's own USDA hardiness band, zones 8aUSDA PHZM 2023
- 535 documented contamination sites on the federal record near Cardiff, the closest Underground Storage Tanks record about 1.0 miles out from the town centreFederal environmental registers
- Cardiff's boundary and the 134 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8a and a ~270-day seasonGrowable Ground crop-matching engine
- The ecoregion at Cardiff's own centroid, the Southwestern AppalachiansUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Cardiff has no normal of its own, so its county's is the closest measured readfrom Jefferson County
- Soil character — no town-scale survey exists, so Cardiff's 134 acres read through its county's SSURGO summaryfrom Jefferson County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Jefferson 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 Jefferson County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Cardiff's 134 acreswhy one lot differs from the next →
- Which side of Cardiff you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 134 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 1.0 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 Cardiff-wide figureread your own land →
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