Millersburg, Ohio, sits in USDA hardiness zone 6a — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
A short list that earns its place here — cabbage, hazelnut, lavender, and collard greens — with any one site's soil, sun, and drainage making the final cut.
Even in Millersburg, 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 Millersburg 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 Millersburg — soil, climate, flood, and parcel records. How we handle your address.
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Millersburg — the short answer
Millersburg, Ohio: USDA zone 6a, about 190 days between hard freezes, across 2K acres of town.
- USDA zone
- 6a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 16
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 23
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~190
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 2K 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 6a is Millersburg's average, not your lot's — a low corner or a tree line moves it. Against Millersburg's 190-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Millersburg
Each reading below is measured for Millersburg itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredMillersburg runs about 190 days between hard freezes — a moderate growing season.
There is room for the full run of cool-season crops plus a warm-season main crop, but the calendar is tight enough that a late spring or early fall frost still decides how much finishes.
Time warm-season transplants to your last hard freeze, and a few weeks of season extension turns a near-miss harvest into a sure one.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredMillersburg sits in USDA hardiness zone 6a.
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 Millersburg is in
Millersburg sits in the Erie Drift Plain — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Millersburg's own centroid, and it is not what its county reads: Holmes County is mostly Western Allegheny Plateau. The wider page above you is answering a different question about different ground.
What Grows in Millersburg
Every plant below cleared Millersburg's own zone 6a and its 190-day season. Each card opens that plant's Ohio profile. How we score.
Is it too late to plant in Millersburg?
Usually not — gardeners here simply switch what goes in the ground as the season moves. Cool-season crops can go in from around Mar 19; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 16 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 23 — long-season crops need about 90 days of runway, quick greens only 30. Even past midsummer there is room for a true fall garden here, and garlic planted near the close carries the momentum into next year.
Documented around Millersburg
Survey cells within 31 miles of Millersburg checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 38 miles off. What to watch for.
What's on the federal record near Millersburg
Closest first, within ~10 miles of Millersburg. Listing isn't leaking, and distance isn't exposure.
- BP OIL CO. #05976Underground Storage Tanks · 350 ft
- BP OIL COBrownfields · 400 ft
- CASTLE BUILDINGUnderground Storage Tanks · 1300 ft
- MILLERSBURG SOUTH BELLSTORESUnderground Storage Tanks · 1900 ft
- MID-OHIO TRANSITUnderground Storage Tanks · 2200 ft
- DOLLAR GENERAL STORE #211Brownfields · 0.5 mi
- DENHART SERVICES, INC.Underground Storage Tanks · 0.6 mi
- VILLAGE MOTORS, INC.Underground Storage Tanks · 0.6 mi
- MILLERSBURG WEST BELLSTORESUnderground Storage Tanks · 0.6 mi
- WASTEQUIP MANUFACTURING COToxics Release Inventory · 0.8 mi
- JOEL POMERENE MEMORIAL HOSPITALUnderground Storage Tanks · 0.8 mi
- JOEL POMERENE MEMORIAL HOSPITALBrownfields · 0.9 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Millersburg'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 Millersburg.
Total Sites
132
within ~10 miles of Millersburg
Risk Level
Moderate
Highest-severity
11 Toxics Release Inventory facilities
Sources Checked
within ~10 miles of Millersburg
Severity Distribution
within ~10 miles of Millersburg
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Millersburg, Toxics Release Inventory runs higher than the national average — 11 sites within ~10 miles of Millersburg. 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.
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Check your specific parcel in Millersburg
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 Millersburg average
Your land is one point inside Millersburg
Everything above resolves to Millersburg as a whole — one PHZM band and one 28°F frost record, read across 2K 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 Millersburg Average
Millersburg Average
- ●USDA Zones 6a, averaged across Millersburg
- ●One soil character for all of Millersburg
- ●Frost dates read at Millersburg's scale: Apr 16 to Oct 23
YOUR Parcel
- ✓Your exact zone, not Millersburg's 6a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Millersburg
Pull a site-specific report for your exact address in Millersburg, Ohio — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Millersburg averages can't show:
We read public map data around Millersburg — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Millersburg average
How we know this about Millersburg
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 Millersburg’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 Millersburg
When does frost risk typically end in Millersburg?
The last hard freeze (28°F) in Millersburg typically lands around Apr 16, 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 May 7.
When is the first frost in Millersburg?
The first hard freeze (28°F) in Millersburg typically arrives around Oct 23, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 9, so the watching starts about Sep 23 — about 190 days after the spring freeze cleared.
How long is the growing season in Millersburg?
Measured between 28°F hard freezes, Millersburg sees about 190 frost-free days — roughly Apr 16 through Oct 23, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 7 to Oct 9, about 155 days.
Is the soil safe to grow vegetables in Millersburg?
The federal record around Millersburg shows 132 documented sites, mostly Underground Storage Tanks entries (76), the nearest Underground Storage Tanks record under a tenth of a mile 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.
How do I protect my plants from frost in Millersburg?
From about Sep 23 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 Oct 23 (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 Oct 23. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Millersburg's scale — its 6a band and its 190-day season. Your yard writes its own version of Millersburg'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 Millersburg’s own scale
7 of the readings below were taken at Millersburg's own scale — its own ~190-day season between 28°F freezes, the 1,641 acres it covers and 132 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Millersburg's own USDA hardiness band, zones 6aUSDA PHZM 2023
- Millersburg's own 28°F hard-freeze dates, about Apr 16 and Oct 23 and the ~190-day span between themNOAA 1991–2020 Climate Normals
- 132 documented contamination sites on the federal record near Millersburg, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- Millersburg's boundary and the 1,641 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6a and a ~190-day seasonGrowable Ground crop-matching engine
- Millersburg sits in the Erie Drift Plain — not the ecoregion its county mostly readsUS EPA Level III Ecoregions
- Lanternfly survey cells around Millersburg checked, none carrying a detectionlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Millersburg's 1,641 acres read through its county's SSURGO summaryfrom Holmes County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Holmes 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 Holmes County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Millersburg's 1,641 acreswhy one lot differs from the next →
- Which side of Millersburg you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 1,641 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record under a tenth of a mile 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 Millersburg-wide figureread your own land →
More in Ohio
Wider growing context
What grows across OhioMillersburg sits outside our named growing regions, so Ohio as a whole is its closest context here.
Nearby growing guides