Sylvan Springs, Alabama, sits in USDA hardiness zone 8b — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
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 Sylvan Springs, 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 Sylvan Springs 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 Sylvan Springs — soil, climate, flood, and parcel records. How we handle your address.
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Sylvan Springs — the short answer
Sylvan Springs, Alabama: USDA zone 8b, about 270 days between hard freezes, across 6K acres of town.
- USDA zone
- 8b
- 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
- 6K 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 8b is Sylvan Springs's average, not your lot's — a low corner or a tree line moves it. Against Sylvan Springs's 270-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Sylvan Springs
Each reading below is measured for Sylvan Springs itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
From county recordsSylvan Springs runs about 270 days between hard freezes (read from Jefferson County, the closest normal to Sylvan Springs) — 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
MeasuredSylvan Springs 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 Sylvan Springs is in
Sylvan Springs sits in the Southwestern Appalachians — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Sylvan Springs's own centroid rather than borrowed from Jefferson County.
What Grows in Sylvan Springs
Every plant below cleared Sylvan Springs's own zone 8b and its 270-day season. Each card opens that plant's Alabama profile. How we score.
Is it too late to plant in Sylvan Springs?
Usually not — gardeners here simply switch what goes in the ground as the season moves. 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 Sylvan Springs
Closest first, within ~10 miles of Sylvan Springs. Listing isn't leaking, and distance isn't exposure.
- SYLVAN SPRINGS LANDFILL FIRESuperfund · 1.3 mi
- JACK PATRICKUnderground Storage Tanks · 1.4 mi
- THOMPSON GROCERYUnderground Storage Tanks · 1.4 mi
- AL0107 - JET PEPUnderground Storage Tanks · 1.4 mi
- OLE TOWN MARKET CHEVRONUnderground Storage Tanks · 1.5 mi
- MARLONSUnderground Storage Tanks · 1.5 mi
- RACEWAY #0865Underground Storage Tanks · 2.1 mi
- WARRIOR & GULF NAVIGATION COUnderground Storage Tanks · 2.1 mi
- BESSEMER BIRMINGPORT - 11512Underground Storage Tanks · 2.7 mi
- ARCO/LYONDELL PETROCHEMICALUnderground Storage Tanks · 3.1 mi
- MULGA MINEUnderground Storage Tanks · 3.1 mi
- MULGA CONVENIENCE STOREUnderground Storage Tanks · 3.4 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Sylvan Springs'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 Sylvan Springs.
Total Sites
697
within ~10 miles of Sylvan Springs
Risk Level
Elevated
Highest-severity
13 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Sylvan Springs
Severity Distribution
within ~10 miles of Sylvan Springs
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Sylvan Springs, two things run higher than the national average within ~10 miles of Sylvan Springs — Superfund (13 sites) and Toxics Release Inventory (53 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.
Toxics Release Inventory: TRI facilities report annual chemical releases to air, water, and land.
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Check your specific parcel in Sylvan Springs
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 Sylvan Springs average
Your land is one point inside Sylvan Springs
Everything above resolves to Sylvan Springs as a whole — one PHZM band, read across 6K 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 Sylvan Springs Average
Sylvan Springs Average
- ●USDA Zones 8b, averaged across Sylvan Springs
- ●One soil character for all of Sylvan Springs
- ●Frost dates read at Sylvan Springs's scale: Mar 2 to Nov 27
YOUR Parcel
- ✓Your exact zone, not Sylvan Springs's 8b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Sylvan Springs
Pull a site-specific report for your exact address in Sylvan Springs, Alabama — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Sylvan Springs averages can't show:
We read public map data around Sylvan Springs — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Sylvan Springs average
How we know this about Sylvan Springs
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 Sylvan Springs
When does frost risk typically end in Sylvan Springs?
The last hard freeze (28°F) in Sylvan Springs 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 Sylvan Springs?
The first hard freeze (28°F) in Sylvan Springs 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 Sylvan Springs?
Measured between 28°F hard freezes, Sylvan Springs 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 Sylvan Springs?
The federal record around Sylvan Springs is a meaningful one — 697 documented sites, mostly Underground Storage Tanks entries (438), the nearest Superfund record about 1.3 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 Sylvan Springs?
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 Sylvan Springs's scale — its 8b band and its 270-day season. Your yard writes its own version of Sylvan Springs'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 Sylvan Springs’s own scale
5 of the readings below were taken at Sylvan Springs's own scale — the 5,964 acres it covers and 697 documented sites around it; 5 are borrowed from a wider read, named and linked below.
Measured here
- Sylvan Springs's own USDA hardiness band, zones 8bUSDA PHZM 2023
- 697 documented contamination sites on the federal record near Sylvan Springs, the closest Superfund record about 1.3 miles out from the town centreFederal environmental registers
- Sylvan Springs's boundary and the 5,964 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 8b and a ~270-day seasonGrowable Ground crop-matching engine
- The ecoregion at Sylvan Springs's own centroid, the Southwestern AppalachiansUS EPA Level III Ecoregions
Inherited from a wider read
- The 28°F hard-freeze dates — Sylvan Springs 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 Sylvan Springs's 5,964 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 Sylvan Springs's 5,964 acreswhy one lot differs from the next →
- Which side of Sylvan Springs you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 5,964 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Superfund record about 1.3 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 Sylvan Springs-wide figureread your own land →
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