State Line City, Indiana, sits in USDA hardiness zone 6a — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
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 State Line City, 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 State Line City 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 State Line City — soil, climate, flood, and parcel records. How we handle your address.
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State Line City — the short answer
State Line City, Indiana: USDA zone 6a, about 205 days between hard freezes, across 89 acres of town.
- USDA zone
- 6a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 6
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 28
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~205
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 89 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 State Line City's average, not your lot's — a low corner or a tree line moves it. Against State Line City's 205-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in State Line City
Each reading below is measured for State Line City itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredState Line City 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
MeasuredState Line City 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 State Line City is in
State Line City sits in the Interior River Valleys and Hills — EPA Level III, inside the wider Eastern Temperate Forests. That is read at State Line City's own centroid, and it is not what its county reads: Warren County is mostly Central Corn Belt Plains. The wider page above you is answering a different question about different ground.
What Grows in State Line City
Every plant below cleared State Line City'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 State Line City?
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 9; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 6 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 28 — long-season crops need about 90 days of runway, quick greens only 30. Here the season winds down slowly: late sowings, a real autumn harvest, and garlic in the ground before the first hard freeze.
What's on the federal record near State Line City
Closest first, within ~10 miles of State Line City. Listing isn't leaking, and distance isn't exposure.
- US POST OFFICEUnderground Storage Tanks · 850 ft
- Archer Daniels Midland Tabor Grain CompanyUnderground Storage Tanks · 1900 ft
- CENTRAL STATES DIST SERVICEBrownfields · 3.8 mi
- THYSSENKRUPP CRANKSHAFT CO LLCToxics Release Inventory · 3.9 mi
- THYSSENKRUPP CRANKSHAFT CO LLCBrownfields · 3.9 mi
- CHEM-CAST LTDToxics Release Inventory · 4.0 mi
- Vermilion Co Airport AuthorityUnderground Storage Tanks · 4.0 mi
- THYSSENKRUPP CRANKSHAFT COBrownfields · 4.1 mi
- WYMAN-GORDON COToxics Release Inventory · 4.1 mi
- THYSSENKRUPP CRANKSHAFT COToxics Release Inventory · 4.1 mi
- LEISCH, JUDITHBrownfields · 4.2 mi
- AutoZone Distribution Center (DC33)Underground Storage Tanks · 4.2 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from State Line City'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 State Line City.
Total Sites
369
within ~10 miles of State Line City
Risk Level
Elevated
Highest-severity
6 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of State Line City
Severity Distribution
within ~10 miles of State Line City
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around State Line City, two things run higher than the national average within ~10 miles of State Line City — Toxics Release Inventory (35 sites) and Superfund (6 sites). It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
Toxics Release Inventory: TRI facilities report annual chemical releases to air, water, and land.
Superfund: Superfund sites represent the most severe contamination in the federal system.
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Check your specific parcel in State Line City
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 State Line City average
Your land is one point inside State Line City
Everything above resolves to State Line City as a whole — one PHZM band and one 28°F frost record, read across 89 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 State Line City Average
State Line City Average
- ●USDA Zones 6a, averaged across State Line City
- ●One soil character for all of State Line City
- ●Frost dates read at State Line City's scale: Apr 6 to Oct 28
YOUR Parcel
- ✓Your exact zone, not State Line City's 6a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in State Line City
Pull a site-specific report for your exact address in State Line City, Indiana — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that State Line City averages can't show:
We read public map data around State Line City — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the State Line City average
How we know this about State Line City
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 State Line City’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 State Line City
When does frost risk typically end in State Line City?
The last hard freeze (28°F) in State Line City typically lands around Apr 6, 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 27.
When is the first frost in State Line City?
The first hard freeze (28°F) in State Line City typically arrives around Oct 28, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 14, so the watching starts about Sep 28 — about 205 days after the spring freeze cleared.
How long is the growing season in State Line City?
Measured between 28°F hard freezes, State Line City sees about 205 frost-free days — roughly Apr 6 through Oct 28, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 27 to Oct 14, about 170 days.
Is the soil safe to grow vegetables in State Line City?
The federal record around State Line City is a meaningful one — 369 documented sites, mostly Underground Storage Tanks entries (215), the nearest Underground Storage Tanks 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 State Line City?
From about Sep 28 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 28 (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 28. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at State Line City's scale — its 6a band and its 205-day season. Your yard writes its own version of State Line City'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 State Line City’s own scale
6 of the readings below were taken at State Line City's own scale — its own ~205-day season between 28°F freezes, the 89 acres it covers and 369 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- State Line City's own USDA hardiness band, zones 6aUSDA PHZM 2023
- State Line City's own 28°F hard-freeze dates, about Apr 6 and Oct 28 and the ~205-day span between themNOAA 1991–2020 Climate Normals
- 369 documented contamination sites on the federal record near State Line City, the closest Underground Storage Tanks record about 0.2 miles out from the town centreFederal environmental registers
- State Line City's boundary and the 89 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6a and a ~205-day seasonGrowable Ground crop-matching engine
- State Line City sits in the Interior River Valleys and Hills — not the ecoregion its county mostly readsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so State Line City's 89 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 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 Warren County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among State Line City's 89 acreswhy one lot differs from the next →
- Which side of State Line City you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 89 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks 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 State Line City-wide figureread your own land →
More in Indiana
Wider growing context
What grows across IndianaState Line City sits outside our named growing regions, so Indiana as a whole is its closest context here.
Nearby growing guides