Auburn, Indiana, sits in USDA hardiness zone 6a — a zone band wide enough that plant choice, not possibility, is the interesting question.
These conditions suit cabbage, hazelnut, lavender, and collard greens — a starting list any specific site will trim or extend with its own soil, sun, and drainage.
Even in Auburn, 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 Auburn 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 Auburn — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Auburn — the short answer
Auburn, Indiana: USDA zone 6a, about 199 days between hard freezes, across 6K acres of city.
- USDA zone
- 6a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 13
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 29
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~199
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 6K 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 Auburn's average, not your lot's — a low corner or a tree line moves it. Against Auburn's 199-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Auburn
Each reading below is measured for Auburn itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredAuburn runs about 199 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
MeasuredAuburn 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 Auburn is in
Auburn sits in the Eastern Corn Belt Plains — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Auburn's own centroid rather than borrowed from DeKalb County.
What Grows in Auburn
Every plant below cleared Auburn's own zone 6a and its 199-day season. Each card opens that plant's Indiana profile. How we score.
Is it too late to plant in Auburn?
For most of the year, no — what changes is which crops still fit the days remaining. Cool-season crops can go in from around Mar 16; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 13 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 29 — long-season crops need about 90 days of runway, quick greens only 30. The tail of the season still works: sixty-day crops into late summer, quick greens after, garlic last of all.
Documented around Auburn
Spotted lanternfly documented 21 miles from Auburn, first recorded 2023. What to watch for.
What's on the federal record near Auburn
Closest first, within ~10 miles of Auburn. Listing isn't leaking, and distance isn't exposure.
- Lesser Service NorthUnderground Storage Tanks · 300 ft
- BROWN & BROWN INSURANCE AGENCYUnderground Storage Tanks · 850 ft
- Messenger LLCUnderground Storage Tanks · 1000 ft
- RENAISSANCE PUBLISHINGBrownfields · 1100 ft
- UNION TOWNSHIP TRUSTEEUnderground Storage Tanks · 1200 ft
- Smoke For LessUnderground Storage Tanks · 1200 ft
- BASSETT OFFICE SUPPLY INCORPORATEDUnderground Storage Tanks · 1200 ft
- CEDAR CREEK PCB SITESuperfund · 1600 ft
- LEE A PONTIUSUnderground Storage Tanks · 1900 ft
- PETRO LANE GAS SERVICE STATIONUnderground Storage Tanks · 2000 ft
- EATON CORPORATION CLUTCH DIVIBrownfields · 2000 ft
- EATON CORPORATION CLUTCH DIVIToxics Release Inventory · 2000 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Auburn'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 Auburn.
Total Sites
275
within ~10 miles of Auburn
Risk Level
Elevated
Highest-severity
2 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Auburn
Severity Distribution
within ~10 miles of Auburn
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Auburn, Toxics Release Inventory runs higher than the national average — 56 sites within ~10 miles of Auburn. 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 Auburn
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 Auburn average
Your land is one point inside Auburn
Everything above resolves to Auburn as a whole — one PHZM band and one 28°F frost record, read across 6K 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 city 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 Auburn Average
Auburn Average
- ●USDA Zones 6a, averaged across Auburn
- ●One soil character for all of Auburn
- ●Frost dates read at Auburn's scale: Apr 13 to Oct 29
YOUR Parcel
- ✓Your exact zone, not Auburn's 6a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Auburn
Pull a site-specific report for your exact address in Auburn, Indiana — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Auburn averages can't show:
We read public map data around Auburn — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Auburn average
How we know this about Auburn
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at this city’s own centroid; hard-freeze dates from NOAA 1991–2020 28°F normals at Auburn’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 city grain anywhere on this page — there is no city-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 Auburn
When does frost risk typically end in Auburn?
The last hard freeze (28°F) in Auburn typically lands around Apr 13, 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 4.
When is the first frost in Auburn?
The first hard freeze (28°F) in Auburn typically arrives around Oct 29, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 15, so the watching starts about Sep 29 — about 199 days after the spring freeze cleared.
How long is the growing season in Auburn?
Measured between 28°F hard freezes, Auburn sees about 199 frost-free days — roughly Apr 13 through Oct 29, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 4 to Oct 15, about 164 days.
Is the soil safe to grow vegetables in Auburn?
The federal record around Auburn is a meaningful one — 275 documented sites, mostly Underground Storage Tanks entries (133), 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 Auburn?
From about Sep 29 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 29 (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 29. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Auburn's scale — its 6a band and its 199-day season. Your yard writes its own version of Auburn'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 Auburn’s own scale
7 of the readings below were taken at Auburn's own scale — its own ~199-day season between 28°F freezes, the 5,503 acres it covers and 275 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Auburn's own USDA hardiness band, zones 6aUSDA PHZM 2023
- Auburn's own 28°F hard-freeze dates, about Apr 13 and Oct 29 and the ~199-day span between themNOAA 1991–2020 Climate Normals
- 275 documented contamination sites on the federal record near Auburn, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- Auburn's boundary and the 5,503 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6a and a ~199-day seasonGrowable Ground crop-matching engine
- The ecoregion at Auburn's own centroid, the Eastern Corn Belt PlainsUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Auburnlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Auburn's 5,503 acres read through its county's SSURGO summaryfrom DeKalb County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom DeKalb 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 DeKalb County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Auburn's 5,503 acreswhy one lot differs from the next →
- Which side of Auburn you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 5,503 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 Auburn-wide figureread your own land →
More in Indiana
Wider growing context
What grows across IndianaAuburn sits outside our named growing regions, so Indiana as a whole is its closest context here.