Joppa, Alabama, sits in USDA hardiness zone 8a — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
Well-matched crops include cabbage, fig, california poppy, and collard greens, and the gap between "grows in the area" and "grows in your yard" is closed by soil, sun, and drainage.
Even in Joppa, 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 Joppa 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 Joppa — soil, climate, flood, and parcel records. How we handle your address.
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Joppa — the short answer
Joppa, Alabama: USDA zone 8a, about 259 days between hard freezes, across 1K acres of town.
- USDA zone
- 8a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 11
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 25
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~259
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 1K 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 Joppa's average, not your lot's — a low corner or a tree line moves it. Against Joppa's 259-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Joppa
Each reading below is measured for Joppa itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredJoppa runs about 259 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
MeasuredJoppa 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 Joppa is in
Joppa sits in the Southwestern Appalachians — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Joppa's own centroid rather than borrowed from Cullman County.
What Grows in Joppa
Every plant below cleared Joppa's own zone 8a and its 259-day season. Each card opens that plant's Alabama profile. How we score.
Is it too late to plant in Joppa?
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 11; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 11 (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. With a season this long, “too late” mostly means “switch crops” — second sowings and a full fall garden are the norm, with garlic closing the year.
What's on the federal record near Joppa
Closest first, within ~10 miles of Joppa. Listing isn't leaking, and distance isn't exposure.
- AL0012 JET PEPUnderground Storage Tanks · 1100 ft
- JOPPA GENERAL STOREUnderground Storage Tanks · 2000 ft
- 4 WAY SHELL TRUCK STOPUnderground Storage Tanks · 0.5 mi
- ALDOT JOPPA DIV 1 DIST 4Underground Storage Tanks · 0.7 mi
- WAL-MART STORE #306Brownfields · 1.0 mi
- WEST SIDE S&M WILLIAMS SERVICEUnderground Storage Tanks · 1.6 mi
- SCI SYS INCBrownfields · 1.7 mi
- SCI SYS INCToxics Release Inventory · 1.7 mi
- ARMORY OMS #4Underground Storage Tanks · 1.7 mi
- COKER FARMCAFO · 2.0 mi
- EAST CULLMAN WATER SYSTEMPFAS · 2.0 mi
- JOPPA, HULACO & RYAN WATER AUTHORITYPFAS · 2.0 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Joppa'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 Joppa.
Total Sites
192
within ~10 miles of Joppa
Risk Level
Elevated
Highest-severity
1 Superfund site (none NPL-listed)
Sources Checked
within ~10 miles of Joppa
Severity Distribution
within ~10 miles of Joppa
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Joppa, CAFO runs higher than the national average — 56 sites within ~10 miles of Joppa. 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.
Wash all produce consumed raw thoroughly, especially leafy greens grown near CAFOs.
Check your specific parcel in Joppa
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 Joppa average
Your land is one point inside Joppa
Everything above resolves to Joppa as a whole — one PHZM band and one 28°F frost record, read across 1K 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 Joppa Average
Joppa Average
- ●USDA Zones 8a, averaged across Joppa
- ●One soil character for all of Joppa
- ●Frost dates read at Joppa's scale: Mar 11 to Nov 25
YOUR Parcel
- ✓Your exact zone, not Joppa's 8a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Joppa
Pull a site-specific report for your exact address in Joppa, Alabama — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Joppa averages can't show:
We read public map data around Joppa — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Joppa average
How we know this about Joppa
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 Joppa’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 Joppa
When does frost risk typically end in Joppa?
The last hard freeze (28°F) in Joppa typically lands around Mar 11, 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 1.
When is the first frost in Joppa?
The first hard freeze (28°F) in Joppa 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 259 days after the spring freeze cleared.
How long is the growing season in Joppa?
Measured between 28°F hard freezes, Joppa sees about 259 frost-free days — roughly Mar 11 through Nov 25, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 1 to Nov 11, about 224 days.
Is the soil safe to grow vegetables in Joppa?
The federal record around Joppa is a meaningful one — 192 documented sites, mostly Underground Storage Tanks entries (98), the nearest Underground Storage Tanks record about 0.2 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 Joppa?
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 Joppa's scale — its 8a band and its 259-day season. Your yard writes its own version of Joppa'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 Joppa’s own scale
6 of the readings below were taken at Joppa's own scale — its own ~259-day season between 28°F freezes, the 1,244 acres it covers and 192 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Joppa's own USDA hardiness band, zones 8aUSDA PHZM 2023
- Joppa's own 28°F hard-freeze dates, about Mar 11 and Nov 25 and the ~259-day span between themNOAA 1991–2020 Climate Normals
- 192 documented contamination sites on the federal record near Joppa, the closest Underground Storage Tanks record about 0.2 miles out from the town centreFederal environmental registers
- Joppa's boundary and the 1,244 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8a and a ~259-day seasonGrowable Ground crop-matching engine
- The ecoregion at Joppa's own centroid, the Southwestern AppalachiansUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Joppa's 1,244 acres read through its county's SSURGO summaryfrom Cullman County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Cullman 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 Cullman County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Joppa's 1,244 acreswhy one lot differs from the next →
- Which side of Joppa you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 1,244 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.2 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 Joppa-wide figureread your own land →
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