Ossian, Indiana, sits in USDA hardiness zone 6a — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
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 Ossian, 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 Ossian 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 Ossian — soil, climate, flood, and parcel records. How we handle your address.
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Ossian — the short answer
Ossian, Indiana: USDA zone 6a, about 205 days between hard freezes, across 1K acres of town.
- USDA zone
- 6a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 10
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 1
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~205
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 1K 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 Ossian's average, not your lot's — a low corner or a tree line moves it. Against Ossian's 205-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Ossian
Each reading below is measured for Ossian itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredOssian runs about 205 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
MeasuredOssian 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 Ossian is in
Ossian sits in the Eastern Corn Belt Plains — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Ossian's own centroid rather than borrowed from Wells County.
What Grows in Ossian
Every plant below cleared Ossian's own zone 6a and its 205-day season. Each card opens that plant's Indiana profile. How we score.
Is it too late to plant in Ossian?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Mar 13; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 10 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 1 — 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 Ossian
Spotted lanternfly documented 14 miles from Ossian, first recorded 2023. What to watch for.
What's on the federal record near Ossian
Closest first, within ~10 miles of Ossian. Listing isn't leaking, and distance isn't exposure.
- OZ OilUnderground Storage Tanks · 700 ft
- JOHNSON SERVICE STATIONUnderground Storage Tanks · 700 ft
- BOB BATE CHEVROLET INCORPORATEDUnderground Storage Tanks · 850 ft
- OSSIAN ELEMENTARY SCHOOLUnderground Storage Tanks · 850 ft
- H & J AUTOMOTIVEUnderground Storage Tanks · 950 ft
- OSSIAN PUBLIC LIBRARYUnderground Storage Tanks · 1600 ft
- GTE OSSIAN CENTRAL OFFICEUnderground Storage Tanks · 1800 ft
- NATIONAL OILUnderground Storage Tanks · 2300 ft
- OSSIAN DELIUnderground Storage Tanks · 2300 ft
- ENERGY CONTROL INCORPORATEDUnderground Storage Tanks · 2500 ft
- ENERGY CONTROL INCToxics Release Inventory · 2600 ft
- ENERGY CONTROL INCBrownfields · 2600 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Ossian'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 Ossian.
Total Sites
303
within ~10 miles of Ossian
Risk Level
Elevated
Highest-severity
1 Superfund site (none NPL-listed)
Sources Checked
within ~10 miles of Ossian
Severity Distribution
within ~10 miles of Ossian
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Ossian, Toxics Release Inventory runs higher than the national average — 33 sites within ~10 miles of Ossian. 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 Ossian
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 Ossian average
Your land is one point inside Ossian
Everything above resolves to Ossian as a whole — one PHZM band and one 28°F frost record, read across 1K 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 Ossian Average
Ossian Average
- ●USDA Zones 6a, averaged across Ossian
- ●One soil character for all of Ossian
- ●Frost dates read at Ossian's scale: Apr 10 to Nov 1
YOUR Parcel
- ✓Your exact zone, not Ossian's 6a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Ossian
Pull a site-specific report for your exact address in Ossian, Indiana — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Ossian averages can't show:
We read public map data around Ossian — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Ossian average
How we know this about Ossian
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 Ossian’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 Ossian
When does frost risk typically end in Ossian?
The last hard freeze (28°F) in Ossian typically lands around Apr 10, 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 1.
When is the first frost in Ossian?
The first hard freeze (28°F) in Ossian typically arrives around Nov 1, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 18, so the watching starts about Oct 2 — about 205 days after the spring freeze cleared.
How long is the growing season in Ossian?
Measured between 28°F hard freezes, Ossian sees about 205 frost-free days — roughly Apr 10 through Nov 1, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 1 to Oct 18, about 170 days.
Is the soil safe to grow vegetables in Ossian?
The federal record around Ossian is a meaningful one — 303 documented sites, mostly Underground Storage Tanks entries (161), the nearest Underground Storage Tanks record about 0.1 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 Ossian?
From about Oct 2 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 1 (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 1. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Ossian's scale — its 6a band and its 205-day season. Your yard writes its own version of Ossian'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 Ossian’s own scale
7 of the readings below were taken at Ossian's own scale — its own ~205-day season between 28°F freezes, the 1,219 acres it covers and 303 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Ossian's own USDA hardiness band, zones 6aUSDA PHZM 2023
- Ossian's own 28°F hard-freeze dates, about Apr 10 and Nov 1 and the ~205-day span between themNOAA 1991–2020 Climate Normals
- 303 documented contamination sites on the federal record near Ossian, the closest Underground Storage Tanks record about 0.1 miles out from the town centreFederal environmental registers
- Ossian's boundary and the 1,219 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6a and a ~205-day seasonGrowable Ground crop-matching engine
- The ecoregion at Ossian's own centroid, the Eastern Corn Belt PlainsUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Ossianlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Ossian's 1,219 acres read through its county's SSURGO summaryfrom Wells County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Wells County
- The growing challenges every Indiana grower plans around — written at state scale, so they stay on the state guidefrom Indiana
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Wells County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Ossian's 1,219 acreswhy one lot differs from the next →
- Which side of Ossian you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 1,219 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.1 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 Ossian-wide figureread your own land →
More in Indiana
Wider growing context
What grows across IndianaOssian sits outside our named growing regions, so Indiana as a whole is its closest context here.
Nearby growing guides