Kings Mills, Ohio, sits in USDA hardiness zone 6b — a zone band wide enough that plant choice, not possibility, is the interesting question.
On paper, cabbage, hazelnut, lavender, and collard greens all suit these conditions — on the ground, soil, sun, and drainage make the final call.
Even in Kings Mills, 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 Kings Mills 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 Kings Mills — soil, climate, flood, and parcel records. How we handle your address.
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Kings Mills — the short answer
Kings Mills, Ohio: USDA zone 6b, about 214 days between hard freezes, across 721 acres of town.
- USDA zone
- 6b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 2
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 2
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~214
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 721 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 6b is Kings Mills's average, not your lot's — a low corner or a tree line moves it. Against Kings Mills's 214-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Kings Mills
Each reading below is measured for Kings Mills itself — here is what it means for a garden here, and the move an experienced grower makes about it.

Season length
MeasuredKings Mills runs about 214 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
MeasuredKings Mills 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 Kings Mills is in
Kings Mills sits in the Eastern Corn Belt Plains — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Kings Mills's own centroid rather than borrowed from Warren County.
What Grows in Kings Mills
Every plant below cleared Kings Mills's own zone 6b and its 214-day season. Each card opens that plant's Ohio profile. How we score.






























Is it too late to plant in Kings Mills?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Mar 5; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 2 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 2 — 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 Kings Mills
Spotted lanternfly documented 22 miles from Kings Mills, first recorded 2023. What to watch for.
What's on the federal record near Kings Mills
Closest first, within ~10 miles of Kings Mills. Listing isn't leaking, and distance isn't exposure.
- KINGS ISLAND PWSPFAS · 950 ft
- CLINE ESTATEUnderground Storage Tanks · 1100 ft
- KINGS ISLAND CAMPGROUNDUnderground Storage Tanks · 1400 ft
- KINGS MILLS U.S. ARMY RESERVEUnderground Storage Tanks · 1400 ft
- KINGS ISLANDUnderground Storage Tanks · 1400 ft
- W-6 OHNitrate · 1800 ft
- CORTEVA PETERS CARTRIDGEBrownfields · 2500 ft
- PETERS CARTRIDGE FACTORYSuperfund · 0.5 mi
- LENS CRAFTERS KINGS MILL TECHNOLOGY CENTERToxics Release Inventory · 0.5 mi
- VACANT LOTUnderground Storage Tanks · 0.5 mi
- KINGS MILLS LEAD SITESuperfund · 0.7 mi
- DEERFIELD HAMILTON WWTPUnderground Storage Tanks · 0.8 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Kings Mills'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 Kings Mills.
Sources Checked
within ~10 miles of Kings Mills
Severity Distribution
within ~10 miles of Kings Mills
Highest-Severity Sites

A note from Gnorman
What an experienced grower watches for around here
In and around Kings Mills, two things run higher than the national average within ~10 miles of Kings Mills — Toxics Release Inventory (69 sites) and PFAS (8 sites). That's not a problem with your land — it's information about it.
Toxics Release Inventory: TRI facilities report annual chemical releases to air, water, and land.
PFAS: PFAS (per- and polyfluoroalkyl substances) are called "forever chemicals" because they do not biodegrade.
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Test irrigation water source — this is the primary pathway for PFAS to reach garden crops.
Check your specific parcel in Kings Mills
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 Kings Mills average
Your land is one point inside Kings Mills
Everything above resolves to Kings Mills as a whole — one PHZM band and one 28°F frost record, read across 721 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 Kings Mills Average
Kings Mills Average
- ●USDA Zones 6b, averaged across Kings Mills
- ●One soil character for all of Kings Mills
- ●Frost dates read at Kings Mills's scale: Apr 2 to Nov 2
YOUR Parcel
- ✓Your exact zone, not Kings Mills's 6b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Kings Mills
Pull a site-specific report for your exact address in Kings Mills, Ohio — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Kings Mills averages can't show:
We read public map data around Kings Mills — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Kings Mills average
How we know this about Kings Mills
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 Kings Mills’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 Kings Mills
When does frost risk typically end in Kings Mills?
The last hard freeze (28°F) in Kings Mills typically lands around Apr 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 Apr 23.
When is the first frost in Kings Mills?
The first hard freeze (28°F) in Kings Mills typically arrives around Nov 2, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 19, so the watching starts about Oct 3 — about 214 days after the spring freeze cleared.
How long is the growing season in Kings Mills?
Measured between 28°F hard freezes, Kings Mills sees about 214 frost-free days — roughly Apr 2 through Nov 2, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 23 to Oct 19, about 179 days.
Is the soil safe to grow vegetables in Kings Mills?
The federal record around Kings Mills is a meaningful one — 788 documented sites, mostly Underground Storage Tanks entries (396), the nearest PFAS 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 Kings Mills?
From about Oct 3 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 2 (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 2. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Kings Mills's scale — its 6b band and its 214-day season. Your yard writes its own version of Kings Mills'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 Kings Mills’s own scale
7 of the readings below were taken at Kings Mills's own scale — its own ~214-day season between 28°F freezes, the 721 acres it covers and 788 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Kings Mills's own USDA hardiness band, zones 6bUSDA PHZM 2023
- Kings Mills's own 28°F hard-freeze dates, about Apr 2 and Nov 2 and the ~214-day span between themNOAA 1991–2020 Climate Normals
- 788 documented contamination sites on the federal record near Kings Mills, the closest PFAS record about 0.2 miles out from the town centreFederal environmental registers
- Kings Mills's boundary and the 721 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6b and a ~214-day seasonGrowable Ground crop-matching engine
- The ecoregion at Kings Mills's own centroid, the Eastern Corn Belt PlainsUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Kings Millslydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Kings Mills's 721 acres read through its county's SSURGO summaryfrom Warren County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Warren County
- The growing challenges every Ohio grower plans around — written at state scale, so they stay on the state guidefrom Ohio
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Warren County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Kings Mills's 721 acreswhy one lot differs from the next →
- Which side of Kings Mills you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 721 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest PFAS 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 Kings Mills-wide figureread your own land →
More in Ohio
Wider growing context
What grows across OhioKings Mills sits outside our named growing regions, so Ohio as a whole is its closest context here.
Nearby growing guides
