Carthage, 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 Carthage, 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 Carthage 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 Carthage — soil, climate, flood, and parcel records. How we handle your address.
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Carthage — the short answer
Carthage, Indiana: USDA zone 6a, about 211 days between hard freezes, across 364 acres of town.
- USDA zone
- 6a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 5
- 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
- ~211
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 364 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 Carthage's average, not your lot's — a low corner or a tree line moves it. Against Carthage's 211-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Carthage
Each reading below is measured for Carthage itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredCarthage runs about 211 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
MeasuredCarthage 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 Carthage is in
Carthage sits in the Eastern Corn Belt Plains — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Carthage's own centroid rather than borrowed from Rush County.
What Grows in Carthage
Every plant below cleared Carthage's own zone 6a and its 211-day season. Each card opens that plant's Indiana profile. How we score.
Is it too late to plant in Carthage?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Mar 8; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 5 (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. There is slack in a calendar like this — late plantings, second rounds of favorites, and a fall bench that keeps beds working.
Documented around Carthage
Survey cells within 31 miles of Carthage checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 64 miles off. What to watch for.
What's on the federal record near Carthage
Closest first, within ~10 miles of Carthage. Listing isn't leaking, and distance isn't exposure.
- Paveys CarthageUnderground Storage Tanks · 650 ft
- CONTAINER CORPORATION OF AMERICAUnderground Storage Tanks · 800 ft
- CARTHAGE TOWN HALLUnderground Storage Tanks · 850 ft
- INDIGREEN, LLCToxics Release Inventory · 2200 ft
- Indiana Soldiers Sailors Childrens HomeUnderground Storage Tanks · 3.4 mi
- UAP/RICHTERBrownfields · 4.0 mi
- Crop Production Services 3527Underground Storage Tanks · 4.0 mi
- Harvest Land Cooperative IncorporatedUnderground Storage Tanks · 4.0 mi
- KAHLO CHRYSLER JEEP DODGEUnderground Storage Tanks · 4.2 mi
- KNIGHTSTOWN ELEVATOR INCORPORATEDUnderground Storage Tanks · 4.4 mi
- PAULS OIL COMPANY INCORPORATEDUnderground Storage Tanks · 4.4 mi
- B & H CHEMICALSuperfund · 4.5 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Carthage'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 Carthage.
Sources Checked
within ~10 miles of Carthage
Severity Distribution
within ~10 miles of Carthage
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Carthage, two things run higher than the national average within ~10 miles of Carthage — Toxics Release Inventory (11 sites) and Underground Storage Tanks (58 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.
Underground Storage Tanks: Underground storage tanks are the single most common source of soil contamination near homes and gardens.
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Use raised beds with imported soil — this eliminates the primary soil-contact pathway.
Check your specific parcel in Carthage
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 Carthage average
Your land is one point inside Carthage
Everything above resolves to Carthage as a whole — one PHZM band and one 28°F frost record, read across 364 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 Carthage Average
Carthage Average
- ●USDA Zones 6a, averaged across Carthage
- ●One soil character for all of Carthage
- ●Frost dates read at Carthage's scale: Apr 5 to Nov 2
YOUR Parcel
- ✓Your exact zone, not Carthage's 6a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Carthage
Pull a site-specific report for your exact address in Carthage, Indiana — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Carthage averages can't show:
We read public map data around Carthage — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Carthage average
How we know this about Carthage
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 Carthage’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 Carthage
When does frost risk typically end in Carthage?
The last hard freeze (28°F) in Carthage typically lands around Apr 5, 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 26.
When is the first frost in Carthage?
The first hard freeze (28°F) in Carthage 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 211 days after the spring freeze cleared.
How long is the growing season in Carthage?
Measured between 28°F hard freezes, Carthage sees about 211 frost-free days — roughly Apr 5 through Nov 2, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 26 to Oct 19, about 176 days.
Is the soil safe to grow vegetables in Carthage?
The federal record around Carthage is a meaningful one — 94 documented sites, mostly Underground Storage Tanks entries (58), 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 Carthage?
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 Carthage's scale — its 6a band and its 211-day season. Your yard writes its own version of Carthage'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 Carthage’s own scale
7 of the readings below were taken at Carthage's own scale — its own ~211-day season between 28°F freezes, the 364 acres it covers and 94 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Carthage's own USDA hardiness band, zones 6aUSDA PHZM 2023
- Carthage's own 28°F hard-freeze dates, about Apr 5 and Nov 2 and the ~211-day span between themNOAA 1991–2020 Climate Normals
- 94 documented contamination sites on the federal record near Carthage, the closest Underground Storage Tanks record about 0.1 miles out from the town centreFederal environmental registers
- Carthage's boundary and the 364 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6a and a ~211-day seasonGrowable Ground crop-matching engine
- The ecoregion at Carthage's own centroid, the Eastern Corn Belt PlainsUS EPA Level III Ecoregions
- Lanternfly survey cells around Carthage 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 Carthage's 364 acres read through its county's SSURGO summaryfrom Rush County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Rush 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 Rush County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Carthage's 364 acreswhy one lot differs from the next →
- Which side of Carthage you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 364 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 Carthage-wide figureread your own land →
More in Indiana
Wider growing context
What grows across IndianaCarthage sits outside our named growing regions, so Indiana as a whole is its closest context here.
Nearby growing guides