Warren, Indiana, sits in USDA hardiness zone 6a — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
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 Warren, 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 Warren 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 Warren — soil, climate, flood, and parcel records. How we handle your address.
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Warren — the short answer
Warren, Indiana: USDA zone 6a, about 206 days between hard freezes, across 693 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 2
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~206
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 693 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 Warren's average, not your lot's — a low corner or a tree line moves it. Against Warren's 206-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Warren
Each reading below is measured for Warren itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredWarren runs about 206 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
MeasuredWarren 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 Warren is in
Warren sits in the Eastern Corn Belt Plains — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Warren's own centroid rather than borrowed from Huntington County.
What Grows in Warren
Every plant below cleared Warren's own zone 6a and its 206-day season. Each card opens that plant's Indiana profile. How we score.
Is it too late to plant in Warren?
Usually not — gardeners here simply switch what goes in the ground as the season moves. 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 2 — 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 Warren
Spotted lanternfly documented 16 miles from Warren, first recorded 2022. What to watch for.
What's on the federal record near Warren
Closest first, within ~10 miles of Warren. Listing isn't leaking, and distance isn't exposure.
- Oz OilUnderground Storage Tanks · 900 ft
- SATURN WHEEL COMPANYBrownfields · 1200 ft
- IN DOT WARREN UNIT CENTERUnderground Storage Tanks · 1400 ft
- CADYS EXPRESSUnderground Storage Tanks · 1600 ft
- INDIANA CORRUGATED INCORPORATEDUnderground Storage Tanks · 1700 ft
- ECKMAN MOTORS INCORPORATEDUnderground Storage Tanks · 2300 ft
- ECKMAN MOTORS INCBrownfields · 2300 ft
- BOWMANS MARATHONUnderground Storage Tanks · 2600 ft
- SALAMONIE MILLS INCORPORATEDUnderground Storage Tanks · 0.6 mi
- SALAMONIE SCHOOLUnderground Storage Tanks · 0.7 mi
- HL DAUGHERTYUnderground Storage Tanks · 0.8 mi
- WARREN MUNICIPAL WATER WORKSPFAS · 1.0 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Warren'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 Warren.
Total Sites
54
within ~10 miles of Warren
Risk Level
Moderate
Highest-severity
2 concentrated animal feeding operations
Sources Checked
within ~10 miles of Warren
Severity Distribution
within ~10 miles of Warren
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Warren, Underground Storage Tanks runs higher than the national average — 42 sites within ~10 miles of Warren. Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
Underground Storage Tanks: Underground storage tanks are the single most common source of soil contamination near homes and gardens.
Use raised beds with imported soil — this eliminates the primary soil-contact pathway.
Check your specific parcel in Warren
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 Warren average
Your land is one point inside Warren
Everything above resolves to Warren as a whole — one PHZM band and one 28°F frost record, read across 693 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 Warren Average
Warren Average
- ●USDA Zones 6a, averaged across Warren
- ●One soil character for all of Warren
- ●Frost dates read at Warren's scale: Apr 10 to Nov 2
YOUR Parcel
- ✓Your exact zone, not Warren's 6a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Warren
Pull a site-specific report for your exact address in Warren, Indiana — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Warren averages can't show:
We read public map data around Warren — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Warren average
How we know this about Warren
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 Warren’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 Warren
When does frost risk typically end in Warren?
The last hard freeze (28°F) in Warren 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 Warren?
The first hard freeze (28°F) in Warren 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 206 days after the spring freeze cleared.
How long is the growing season in Warren?
Measured between 28°F hard freezes, Warren sees about 206 frost-free days — roughly Apr 10 through Nov 2, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 1 to Oct 19, about 171 days.
Is the soil safe to grow vegetables in Warren?
The federal record around Warren shows 54 documented sites, mostly Underground Storage Tanks entries (42), the nearest Underground Storage Tanks record about 0.2 miles 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 Warren?
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 Warren's scale — its 6a band and its 206-day season. Your yard writes its own version of Warren'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 Warren’s own scale
7 of the readings below were taken at Warren's own scale — its own ~206-day season between 28°F freezes, the 693 acres it covers and 54 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Warren's own USDA hardiness band, zones 6aUSDA PHZM 2023
- Warren's own 28°F hard-freeze dates, about Apr 10 and Nov 2 and the ~206-day span between themNOAA 1991–2020 Climate Normals
- 54 documented contamination sites on the federal record near Warren, the closest Underground Storage Tanks record about 0.2 miles out from the town centreFederal environmental registers
- Warren's boundary and the 693 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6a and a ~206-day seasonGrowable Ground crop-matching engine
- The ecoregion at Warren's own centroid, the Eastern Corn Belt PlainsUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Warrenlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Warren's 693 acres read through its county's SSURGO summaryfrom Huntington County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Huntington 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 Huntington County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Warren's 693 acreswhy one lot differs from the next →
- Which side of Warren you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 693 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 Warren-wide figureread your own land →
More in Indiana
Wider growing context
What grows across IndianaWarren sits outside our named growing regions, so Indiana as a whole is its closest context here.
Nearby growing guides