Spencer County, in Kentucky, sits in USDA hardiness zone 6b — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
Well-matched crops include cabbage, hazelnut, lavender, and collard greens, and the gap between "grows in the area" and "grows in your yard" is closed by soil, sun, and drainage.
Grounded in USDA PHZM 2023 · Growable Ground suitability scoring · NOAA 1991–2020 Climate Normals
Spencer County holds more than one microclimate.
Soils and elevations shift across Spencer County, so your frost dates and drainage aren't the county average. 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 Spencer County — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Spencer County — the short answer
Spencer County, Kentucky: USDA zone 6b, about 221 days between hard freezes, across 119K acres.
- USDA zone
- 6b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 1
- NOAA 1991–2020 Climate Normals, 28°F
- First hard freeze (28°F)
- Nov 8
- NOAA 1991–2020 Climate Normals, 28°F
- Days between freezes
- ~221
- NOAA 1991–2020 Climate Normals, 28°F
- County area
- 119K acres
- US Census TIGER/Line 2025
Every figure names the dataset it came from. Hard-freeze dates are county 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 6b is Spencer County's average, not your lot's — a low corner or a tree line moves it. Against Spencer County's 221-day season, see what your own ground reads.
Heat in Spencer County
Across a year, Spencer County accumulates about 3,976 growing degree days above 50°F, about 316 more than the middle Kentucky county — ahead of 89 of Kentucky’s 120 counties. Degree days are the heat a crop actually gets to work with — more of them is more room to ripen a long-season crop before the freeze closes the window.
Grounded in PRISM Climate Group, Oregon State University — 1991–2020 monthly normals
Soil in Spencer County
Across Spencer County, the ground is predominantly Alfisols, where Faywood, Eden, and Lowell are the most extensive named soil series. The soil is generally well drained with a silt loam surface. Topsoil pH runs about 6.0–6.5, slightly acidic. Rainfall drains through hydrologic group C soils.
Soil order
Alfisols
Drainage
Well drained
Prime farmland
11%
Hydric soils
0%
Soil still varies lot by lot — soil types explained.
How the ground varies across Spencer County
The USDA soil survey maps 90% of Spencer County as well drained — but another 7% drains differently: 4% moderately well drained, 3% somewhat poorly drained.
Faywood is the most extensive named soil at 30% of mapped acres, then Eden (21%) and Lowell (18%).
Which of them your own lot sits on is a parcel question, not a county one. Check your address for the survey at your boundary.
What this means for growing in Spencer County
Each reading below is measured for Spencer County itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Drainage
MeasuredThe dominant soils across Spencer County are well drained, in hydrologic group C — ground that drains quickly.
The upside is soil you can work early in spring and roots that never drown; the cost is that fast-draining ground dries out fast and leaches nutrients away before plants can use them.
Work in compost and mulch to hold moisture and feed, and water more often in short doses than deep and rarely.
USDA NRCS SSURGO
Surface pH
MeasuredTopsoil across Spencer County runs about pH 6.0–6.5, close to neutral.
This is the range most vegetables prefer — one correction you probably do not have to make, which is genuinely good news for a new bed.
Keep it there with compost rather than lime or sulfur, and only amend if your own soil test says otherwise.
USDA NRCS SSURGO
Season length
MeasuredSpencer County runs about 221 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
MeasuredSpencer County sits in USDA hardiness zone 6b.
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 Spencer County is in
Spencer County sits in the Interior Plateau — EPA Level III, inside the wider Eastern Temperate Forests. One consistent ecological setting across the whole county.
What Grows in Spencer County
We scored all 1,086 plants against Spencer County's own USDA zone 6b and its own 221-day season between hard freezes, using the same matching engine that runs a full parcel report. These cleared both. Sun, soil pH and drainage vary lot by lot — those are the parcel questions below. Each card opens that plant's Kentucky profile.
Is it too late to plant in Spencer County?
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 Mar 4; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 1 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 8 — 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.
Documented around Spencer County
Survey cells within 31 miles of Spencer County checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 53 miles off. What to watch for.
What gets applied to farmland in Spencer County
USGS estimates 17,010 lb of Glyphosate on Spencer County farmland in 2019, its largest by weight, ahead of 2,4-d (6,050 lb) and Metolachlor & Metolachlor-s (4,586 lb).
Farmland across the whole county, not any one lot. Check your address for the site-by-site record.
Safe to Grow Here?
What the federal record shows across Spencer County — and how to grow with it.
We checked the federal record across Spencer County — 46 documented sites across 3 of the 9 source types we track.
The most significant on record: 4 nitrate monitoring sites. Agricultural runoff and septic contamination — tracked at public water utilities (service-area exposure), private wells, and groundwater monitoring sites.
The federal record across Spencer County is a modest one — a typical footprint for a growing area. Nothing here calls for alarm; it's worth knowing which recorded sites sit closest to where you grow, and each one on the map carries its type and location. If one turns out to be a near neighbor, a one-time soil test settles the question.
Sources: EPA, USGS — 1.8M documented sites tracked nationwide across 9 federal source types.
What's on the federal record near Spencer County
Closest first, across Spencer County. Listing isn't leaking, and distance isn't exposure.
- Spencer Co State Maintenance GarageUnderground Storage Tanks · 0.6 mi
- Eagle Food MartUnderground Storage Tanks · 0.8 mi
- Cross Roads Grocery & DeliUnderground Storage Tanks · 1.0 mi
- Settlers Trace Lakeside LLCUnderground Storage Tanks · 1.0 mi
- A & M Oil CoUnderground Storage Tanks · 1.3 mi
- Spencer Farm ServiceUnderground Storage Tanks · 1.3 mi
- Ricks Auto ServiceUnderground Storage Tanks · 1.4 mi
- Taylorsville Quick StopUnderground Storage Tanks · 1.4 mi
- Taylorsville MarathonUnderground Storage Tanks · 1.4 mi
- Kraft IncUnderground Storage Tanks · 1.5 mi
- Mckinley Service StationUnderground Storage Tanks · 1.5 mi
- J & A Body ShopUnderground Storage Tanks · 1.5 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Spencer County'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 Spencer County.
Severity Distribution
across Spencer County
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Spencer County, Underground Storage Tanks runs higher than the national average — 41 sites across Spencer County. Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
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 Spencer County
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 Spencer County average
Your land is one point inside Spencer County
Everything above resolves to Spencer County as a whole — one PHZM band and one county frost record, read across 119K 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 county 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 county average.
Your Lot vs the Spencer County Average
Spencer County Average
- ●USDA Zones 6b, averaged across Spencer County
- ●One soil character for all of Spencer County
- ●Frost dates read at Spencer County's scale: Apr 1 to Nov 8
YOUR Parcel
- ✓Your exact zone, not Spencer County's 6b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your parcel in Spencer County
Pull a site-specific report for your exact address in Spencer County, Kentucky — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Spencer County averages can't show:
We read public map data around Spencer County — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Spencer County average
How we know this about Spencer County
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at county grain; hard-freeze dates from NOAA 1991–2020 28°F normals at this county’s own record where one resolves, and the labelled statewide window where none does; soils from the USDA NRCS SSURGO survey, area-weighted across the county’s own map units; boundaries and acreage from US Census TIGER/Line 2025; the contamination and pesticide records from the federal sources named in their beats above. Where Spencer County carries no record of its own, the figure is inherited and labelled — the resolution ledger below names each.
Common questions about Spencer County
When does frost risk typically end in Spencer County?
The last hard freeze (28°F) in Spencer County typically lands around Apr 1, 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 22.
How long is the growing season in Spencer County?
Measured between 28°F hard freezes, Spencer County sees about 221 frost-free days — roughly Apr 1 through Nov 8, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 22 to Oct 25, about 186 days.
Is the soil safe to grow vegetables in Spencer County?
The federal record around Spencer County shows 46 documented sites, mostly Underground Storage Tanks entries (41), the nearest Underground Storage Tanks record about 0.6 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.
Everything above is measured at Spencer County's scale — its 6b band and its 221-day season. Your yard writes its own version of Spencer County's numbers: we read soil, sun, drainage and frost at your exact address. Try it for 14 days — no card required.
Will It Grow Here?
Zone fit is the first question — each answer below reads Kentucky's frost window, season length, and soil profile against the plant's real requirements.
What this page reads at Spencer County’s own scale
8 of the readings below were taken at Spencer County's own scale — its own ~221-day span between 28°F freezes, the 3 most extensive soil series mapped here and 46 documented sites inside its boundary; one is borrowed from a wider read, named and linked below.
Measured here
- Spencer County's own USDA hardiness band, zones 6bUSDA PHZM 2023
- Spencer County's own 28°F hard-freeze dates and its ~221-day span between themNOAA 1991–2020 Climate Normals
- The soil order, drainage, surface pH, and the 3 most extensive named soil series mapped in Spencer CountyUSDA NRCS SSURGO
- 46 documented contamination sites inside the county boundary, distance-sorted from its center — the closest Underground Storage Tanks record about 0.6 miles outFederal environmental registers
- Spencer County's boundary and the 119,469 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6b and a ~221-day seasonGrowable Ground crop-matching engine
- Spencer County sitting wholly inside the Interior PlateauUS EPA Level III Ecoregions
- Which agricultural compounds go onto Spencer County farmland, and roughly how muchUSGS NAWQA EPest county estimates
Inherited from a wider read
- The growing challenges every Kentucky grower plans around — written at state scale, so they stay on the state guidefrom Kentucky
What this page can’t tell you
- How the season shifts across Spencer County — the ~221 days above is one reading at its centre; the 12 towns below each carry their owntowns in this county →
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Spencer County's 119,469 acreswhy one lot differs from the next →
- Which of those 46 documented sites actually reaches your soil — that needs your address, the wind, and the groundwater directionhow we read the record →
- Where cold air settles, which slopes face the sun, and which way the wind runs on your own ground — none of it survives being averaged over Spencer Countyread your own land →