Owen County, in Kentucky, sits in USDA hardiness zone 6b — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
On paper, cabbage, hazelnut, lavender, and collard greens all suit these conditions — on the ground, soil, sun, and drainage make the final call.
Grounded in USDA PHZM 2023 · Growable Ground suitability scoring · NOAA 1991–2020 Climate Normals
Owen County holds more than one microclimate.
Soils and elevations shift across Owen 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 Owen County — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Owen County — the short answer
Owen County, Kentucky: USDA zone 6b, about 218 days between hard freezes, across 224K 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 5
- NOAA 1991–2020 Climate Normals, 28°F
- Days between freezes
- ~218
- NOAA 1991–2020 Climate Normals, 28°F
- County area
- 224K 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 Owen County's average, not your lot's — a low corner or a tree line moves it. Against Owen County's 218-day season, see what your own ground reads.
Heat in Owen County
Across a year, Owen County accumulates about 3,637 growing degree days above 50°F, about 23 fewer than the middle Kentucky county — ahead of 54 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 Owen County
Across Owen County, the ground is predominantly Alfisols, where Eden, Lowell, and Nicholson are the most extensive named soil series. The soil is generally well drained with a flaggy silty clay surface. Topsoil pH runs about 6.0, moderately acidic. Rainfall drains through hydrologic group D soils.
Soil order
Alfisols
Drainage
Well drained
Prime farmland
6%
Hydric soils
0%
Soil still varies lot by lot — soil types explained.
How the ground varies across Owen County
The USDA soil survey maps 93% of Owen County as well drained — but another 7% drains differently: 5% moderately well drained, 1% somewhat poorly drained.
Eden is the most extensive named soil at 70% of mapped acres, then Lowell (11%) and Nicholson (5%).
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 Owen County
Each reading below is measured for Owen 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 Owen County are well drained, in hydrologic group D — 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 Owen County runs about pH 6.0, 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
MeasuredOwen County runs about 218 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
MeasuredOwen 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 Owen County is in
Owen 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 Owen County
We scored all 1,086 plants against Owen County's own USDA zone 6b and its own 218-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 Owen County?
Usually not — gardeners here simply switch what goes in the ground as the season moves. 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 5 — long-season crops need about 90 days of runway, quick greens only 30. There is slack in a calendar like this — late plantings, second rounds of favorites, and a fall bench that keeps beds working.
Documented around Owen County
Spotted lanternfly documented 17 miles from Owen County, first recorded 2023. What to watch for.
What gets applied to farmland in Owen County
USGS estimates 8,972 lb of Glyphosate on Owen County farmland in 2019, its largest by weight, ahead of Metolachlor & Metolachlor-s (2,849 lb) and Metolachlor-s (2,532 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 Owen County — and how to grow with it.
We checked the federal record across Owen County — 62 documented sites across 6 of the 9 source types we track.
The most significant on record: 1 Toxics Release Inventory facility. Active industrial facilities reporting chemical releases to air, water, and land.
There's a meaningful federal record across Owen County — worth a look before you plant food, not a reason to hold back from growing. Proximity to a documented site is information, not a diagnosis of any one yard. A soil test before new food beds is the sensible precaution here, and the map shows exactly which sites sit where, so you can see what's actually near you.
Sources: EPA, USGS — 1.8M documented sites tracked nationwide across 9 federal source types.
What's on the federal record near Owen County
Closest first, across Owen County. Listing isn't leaking, and distance isn't exposure.
- Owenton MarathonUnderground Storage Tanks · 2.0 mi
- Payne ChevyUnderground Storage Tanks · 2.1 mi
- R & R Qwik StopUnderground Storage Tanks · 2.2 mi
- Cowboys # 106Underground Storage Tanks · 2.5 mi
- Stewarts GroceryUnderground Storage Tanks · 2.5 mi
- Carters Service CenterUnderground Storage Tanks · 2.5 mi
- Owen Co Recc HeadquartersUnderground Storage Tanks · 2.7 mi
- Owen Co Bus GarageUnderground Storage Tanks · 2.7 mi
- Owen Co Transfer StationUnderground Storage Tanks · 2.7 mi
- Owenton Chrysler Toyota IncUnderground Storage Tanks · 2.8 mi
- Ashcraft Properties LLCUnderground Storage Tanks · 2.8 mi
- K & K Tire IncUnderground Storage Tanks · 2.9 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Owen 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 Owen County.
Total Sites
62
across Owen County
Risk Level
Elevated
Highest-severity
1 Toxics Release Inventory facility
Sources Checked
across Owen County
Severity Distribution
across Owen County
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Owen County, two things run higher than the national average across Owen County — Mining (4 sites) and Underground Storage Tanks (41 sites). Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
Mining: Mining sites — both historic and active — can leach heavy metals (arsenic, lead, cadmium, mercury) into soil and water for centuries after operations cease.
Underground Storage Tanks: Underground storage tanks are the single most common source of soil contamination near homes and gardens.
Test soil for heavy metals (lead, arsenic, cadmium, mercury) — this is essential near any mining site.
Use raised beds with imported soil — this eliminates the primary soil-contact pathway.
Check your specific parcel in Owen 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 Owen County average
Your land is one point inside Owen County
Everything above resolves to Owen County as a whole — one PHZM band and one county frost record, read across 224K 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 Owen County Average
Owen County Average
- ●USDA Zones 6b, averaged across Owen County
- ●One soil character for all of Owen County
- ●Frost dates read at Owen County's scale: Apr 1 to Nov 5
YOUR Parcel
- ✓Your exact zone, not Owen County's 6b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your parcel in Owen County
Pull a site-specific report for your exact address in Owen County, Kentucky — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Owen County averages can't show:
We read public map data around Owen County — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Owen County average
How we know this about Owen 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 Owen County carries no record of its own, the figure is inherited and labelled — the resolution ledger below names each.
Common questions about Owen County
When does frost risk typically end in Owen County?
The last hard freeze (28°F) in Owen 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 Owen County?
Measured between 28°F hard freezes, Owen County sees about 218 frost-free days — roughly Apr 1 through Nov 5, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 22 to Oct 22, about 183 days.
Is the soil safe to grow vegetables in Owen County?
The federal record around Owen County is a meaningful one — 62 documented sites, mostly Underground Storage Tanks entries (41), the nearest Underground Storage Tanks record about 2.0 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.
Everything above is measured at Owen County's scale — its 6b band and its 218-day season. Your yard writes its own version of Owen 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 Owen County’s own scale
8 of the readings below were taken at Owen County's own scale — its own ~218-day span between 28°F freezes, the 3 most extensive soil series mapped here and 62 documented sites inside its boundary; one is borrowed from a wider read, named and linked below.
Measured here
- Owen County's own USDA hardiness band, zones 6bUSDA PHZM 2023
- Owen County's own 28°F hard-freeze dates and its ~218-day span between themNOAA 1991–2020 Climate Normals
- The soil order, drainage, surface pH, and the 3 most extensive named soil series mapped in Owen CountyUSDA NRCS SSURGO
- 62 documented contamination sites inside the county boundary, distance-sorted from its center — the closest Underground Storage Tanks record about 2.0 miles outFederal environmental registers
- Owen County's boundary and the 224,312 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6b and a ~218-day seasonGrowable Ground crop-matching engine
- Owen County sitting wholly inside the Interior PlateauUS EPA Level III Ecoregions
- Which agricultural compounds go onto Owen 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 Owen County — the ~218 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 Owen County's 224,312 acreswhy one lot differs from the next →
- Which of those 62 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 Owen Countyread your own land →