Hollansburg, Ohio, sits in USDA hardiness zone 6a — 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 Hollansburg, 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 Hollansburg 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 Hollansburg — soil, climate, flood, and parcel records. How we handle your address.
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Hollansburg — the short answer
Hollansburg, Ohio: USDA zone 6a, about 202 days between hard freezes, across 77 acres of town.
- USDA zone
- 6a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 11
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 30
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~202
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 77 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 Hollansburg's average, not your lot's — a low corner or a tree line moves it. Against Hollansburg's 202-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Hollansburg
Each reading below is measured for Hollansburg itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredHollansburg runs about 202 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
MeasuredHollansburg 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 Hollansburg is in
Hollansburg sits in the Eastern Corn Belt Plains — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Hollansburg's own centroid rather than borrowed from Darke County.
What Grows in Hollansburg
Every plant below cleared Hollansburg's own zone 6a and its 202-day season. Each card opens that plant's Ohio profile. How we score.
Is it too late to plant in Hollansburg?
Rarely: the season closes in stages, not all at once, and each stage has its crops. Cool-season crops can go in from around Mar 14; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 11 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 30 — long-season crops need about 90 days of runway, quick greens only 30. A long window like this one runs successions deep into fall — and even its last weeks take quick greens and garlic.
Documented around Hollansburg
Survey cells within 31 miles of Hollansburg checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 49 miles off. What to watch for.
What's on the federal record near Hollansburg
Closest first, within ~10 miles of Hollansburg. Listing isn't leaking, and distance isn't exposure.
- VACANT (JIM'S UNION 76)Underground Storage Tanks · 400 ft
- TEXAS EASTERN TRANSMISSION LPBrownfields · 0.7 mi
- NOBLE SHEPPARDUnderground Storage Tanks · 3.4 mi
- SCHNEIDERS GARAGEUnderground Storage Tanks · 4.2 mi
- PALESTINE SUPER SERVICES INCBrownfields · 4.4 mi
- LIBERTY TOWNSHIPUnderground Storage Tanks · 4.4 mi
- TRI-VILLAGE PRIMARY SCHOOLUnderground Storage Tanks · 4.4 mi
- PALESTINE SUPER SERVICE, INC.Underground Storage Tanks · 4.4 mi
- D-175 MIAM NAWQA LUS WELL BVAS AG-10Nitrate · 4.6 mi
- TRI-VILLAGE HIGH SCHOOLUnderground Storage Tanks · 4.7 mi
- DWANE R. MCCLOTHINUnderground Storage Tanks · 4.7 mi
- NEW MADISON MINI MARTUnderground Storage Tanks · 4.9 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Hollansburg'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 Hollansburg.
Total Sites
112
within ~10 miles of Hollansburg
Risk Level
Elevated
Highest-severity
1 Superfund site (none NPL-listed)
Sources Checked
within ~10 miles of Hollansburg
Severity Distribution
within ~10 miles of Hollansburg
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Hollansburg, Nitrate runs higher than the national average — 48 sites within ~10 miles of Hollansburg. That's not a problem with your land — it's information about it.
Nitrate: Nitrate contamination primarily comes from agricultural fertilizer runoff and failing septic systems.
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Check your specific parcel in Hollansburg
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 Hollansburg average
Your land is one point inside Hollansburg
Everything above resolves to Hollansburg as a whole — one PHZM band and one 28°F frost record, read across 77 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 Hollansburg Average
Hollansburg Average
- ●USDA Zones 6a, averaged across Hollansburg
- ●One soil character for all of Hollansburg
- ●Frost dates read at Hollansburg's scale: Apr 11 to Oct 30
YOUR Parcel
- ✓Your exact zone, not Hollansburg's 6a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Hollansburg
Pull a site-specific report for your exact address in Hollansburg, Ohio — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Hollansburg averages can't show:
We read public map data around Hollansburg — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Hollansburg average
How we know this about Hollansburg
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 Hollansburg’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 Hollansburg
When does frost risk typically end in Hollansburg?
The last hard freeze (28°F) in Hollansburg typically lands around Apr 11, 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 2.
When is the first frost in Hollansburg?
The first hard freeze (28°F) in Hollansburg typically arrives around Oct 30, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 16, so the watching starts about Sep 30 — about 202 days after the spring freeze cleared.
How long is the growing season in Hollansburg?
Measured between 28°F hard freezes, Hollansburg sees about 202 frost-free days — roughly Apr 11 through Oct 30, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 2 to Oct 16, about 167 days.
Is the soil safe to grow vegetables in Hollansburg?
The federal record around Hollansburg is a meaningful one — 112 documented sites, mostly Nitrate entries (48), the nearest Underground Storage Tanks record under a tenth of a mile 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 Hollansburg?
From about Sep 30 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 30 (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 30. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Hollansburg's scale — its 6a band and its 202-day season. Your yard writes its own version of Hollansburg'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 Hollansburg’s own scale
7 of the readings below were taken at Hollansburg's own scale — its own ~202-day season between 28°F freezes, the 77 acres it covers and 112 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Hollansburg's own USDA hardiness band, zones 6aUSDA PHZM 2023
- Hollansburg's own 28°F hard-freeze dates, about Apr 11 and Oct 30 and the ~202-day span between themNOAA 1991–2020 Climate Normals
- 112 documented contamination sites on the federal record near Hollansburg, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- Hollansburg's boundary and the 77 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6a and a ~202-day seasonGrowable Ground crop-matching engine
- The ecoregion at Hollansburg's own centroid, the Eastern Corn Belt PlainsUS EPA Level III Ecoregions
- Lanternfly survey cells around Hollansburg 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 Hollansburg's 77 acres read through its county's SSURGO summaryfrom Darke County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Darke 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 Darke County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Hollansburg's 77 acreswhy one lot differs from the next →
- Which side of Hollansburg you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 77 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 Hollansburg-wide figureread your own land →
More in Ohio
Wider growing context
What grows across OhioHollansburg sits outside our named growing regions, so Ohio as a whole is its closest context here.
Nearby growing guides