Frankfort, 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.
Growers here do well with cabbage, hazelnut, lavender, and collard greens — with the usual caveat that any single yard's soil, sun, and drainage cast the deciding vote.
Even in Frankfort, 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 Frankfort 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 Frankfort — soil, climate, flood, and parcel records. How we handle your address.
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Frankfort — the short answer
Frankfort, Indiana: USDA zone 6a, about 204 days between hard freezes, across 5K acres of city.
- USDA zone
- 6a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 9
- 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
- ~204
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 5K 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 Frankfort's average, not your lot's — a low corner or a tree line moves it. Against Frankfort's 204-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Frankfort
Each reading below is measured for Frankfort itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredFrankfort runs about 204 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
MeasuredFrankfort 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 Frankfort is in
Frankfort sits in the Eastern Corn Belt Plains — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Frankfort's own centroid rather than borrowed from Clinton County.
What Grows in Frankfort
Every plant below cleared Frankfort's own zone 6a and its 204-day season. Each card opens that plant's Indiana profile. How we score.
Is it too late to plant in Frankfort?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Mar 12; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 9 (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 Frankfort
Survey cells within 31 miles of Frankfort checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 32 miles off. What to watch for.
What's on the federal record near Frankfort
Closest first, within ~10 miles of Frankfort. Listing isn't leaking, and distance isn't exposure.
- US TAP INC DBA INDIANA BRASS COMPANY INCToxics Release Inventory · 250 ft
- US TAP INC DBA INDIANA BRASS COMPANY INCSuperfund · 250 ft
- Tobacco Road 260Underground Storage Tanks · 550 ft
- MCCLURE SERVICE STATION NO 48Underground Storage Tanks · 600 ft
- NORFOLK & WESTERN RAILWAY COMPANYUnderground Storage Tanks · 650 ft
- FRANKFORT BULK PLANTUnderground Storage Tanks · 800 ft
- MIKE RAISOR CHRYSLER DODGE JEEPUnderground Storage Tanks · 850 ft
- DEFORD CHRYSLERBrownfields · 950 ft
- Exide TechnologiesUnderground Storage Tanks · 1100 ft
- IMPACT COOPERATIVE INCORPORATEDUnderground Storage Tanks · 1100 ft
- Clinton Township Fire DepartmentUnderground Storage Tanks · 1300 ft
- NORFOLK & WESTERN CORPORATIONUnderground Storage Tanks · 1500 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Frankfort'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 Frankfort.
Total Sites
177
within ~10 miles of Frankfort
Risk Level
Elevated
Highest-severity
10 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Frankfort
Severity Distribution
within ~10 miles of Frankfort
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Frankfort, two things run higher than the national average within ~10 miles of Frankfort — Superfund (10 sites) and Toxics Release Inventory (20 sites). That's not a problem with your land — it's information about it.
Superfund: Superfund sites represent the most severe contamination in the federal system.
Toxics Release Inventory: TRI facilities report annual chemical releases to air, water, and land.
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Check your specific parcel in Frankfort
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 Frankfort average
Your land is one point inside Frankfort
Everything above resolves to Frankfort as a whole — one PHZM band and one 28°F frost record, read across 5K 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 Frankfort Average
Frankfort Average
- ●USDA Zones 6a, averaged across Frankfort
- ●One soil character for all of Frankfort
- ●Frost dates read at Frankfort's scale: Apr 9 to Oct 30
YOUR Parcel
- ✓Your exact zone, not Frankfort's 6a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Frankfort
Pull a site-specific report for your exact address in Frankfort, Indiana — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Frankfort averages can't show:
We read public map data around Frankfort — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Frankfort average
How we know this about Frankfort
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 Frankfort’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 Frankfort
When does frost risk typically end in Frankfort?
The last hard freeze (28°F) in Frankfort typically lands around Apr 9, 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 30.
When is the first frost in Frankfort?
The first hard freeze (28°F) in Frankfort 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 204 days after the spring freeze cleared.
How long is the growing season in Frankfort?
Measured between 28°F hard freezes, Frankfort sees about 204 frost-free days — roughly Apr 9 through Oct 30, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 30 to Oct 16, about 169 days.
Is the soil safe to grow vegetables in Frankfort?
The federal record around Frankfort is a meaningful one — 177 documented sites, mostly Underground Storage Tanks entries (106), the nearest Toxics Release Inventory 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 Frankfort?
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 Frankfort's scale — its 6a band and its 204-day season. Your yard writes its own version of Frankfort'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 Frankfort’s own scale
7 of the readings below were taken at Frankfort's own scale — its own ~204-day season between 28°F freezes, the 5,155 acres it covers and 177 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Frankfort's own USDA hardiness band, zones 6aUSDA PHZM 2023
- Frankfort's own 28°F hard-freeze dates, about Apr 9 and Oct 30 and the ~204-day span between themNOAA 1991–2020 Climate Normals
- 177 documented contamination sites on the federal record near Frankfort, the closest Toxics Release Inventory record under a tenth of a mile out from the town centreFederal environmental registers
- Frankfort's boundary and the 5,155 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6a and a ~204-day seasonGrowable Ground crop-matching engine
- The ecoregion at Frankfort's own centroid, the Eastern Corn Belt PlainsUS EPA Level III Ecoregions
- Lanternfly survey cells around Frankfort 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 Frankfort's 5,155 acres read through its county's SSURGO summaryfrom Clinton County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Clinton 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 Clinton County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Frankfort's 5,155 acreswhy one lot differs from the next →
- Which side of Frankfort you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 5,155 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Toxics Release Inventory 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 Frankfort-wide figureread your own land →
More in Indiana
Wider growing context
What grows across IndianaFrankfort sits outside our named growing regions, so Indiana as a whole is its closest context here.
Nearby growing guides