Jasper, Indiana, sits in USDA hardiness zone 6b — a zone band wide enough that plant choice, not possibility, is the interesting question.
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 Jasper, 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 Jasper 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 Jasper — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Jasper — the short answer
Jasper, Indiana: USDA zone 6b, about 219 days between hard freezes, across 9K acres of city.
- USDA zone
- 6b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 31
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 5
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~219
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 9K 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 6b is Jasper's average, not your lot's — a low corner or a tree line moves it. Against Jasper's 219-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Jasper
Each reading below is measured for Jasper itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredJasper runs about 219 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
MeasuredJasper sits in USDA hardiness zone 6b.
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 Jasper is in
Jasper sits in the Interior River Valleys and Hills — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Jasper's own centroid, and it is not what its county reads: Dubois County is mostly Interior Plateau. The wider page above you is answering a different question about different ground.
What Grows in Jasper
Every plant below cleared Jasper's own zone 6b and its 219-day season. Each card opens that plant's Indiana profile. How we score.
Is it too late to plant in Jasper?
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 3; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 31 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 5 — 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 Jasper
Survey cells within 31 miles of Jasper checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 111 miles off. What to watch for.
What's on the federal record near Jasper
Closest first, within ~10 miles of Jasper. Listing isn't leaking, and distance isn't exposure.
- Hoffman MotorsUnderground Storage Tanks · 450 ft
- MEMORIAL HOSPITAL AND HEALTH CARE CENTERBrownfields · 500 ft
- CARS R USUnderground Storage Tanks · 550 ft
- HUCKS NO 350Underground Storage Tanks · 650 ft
- FORMER HEMBREE LAUNDRYBrownfields · 650 ft
- Chuckles 20Underground Storage Tanks · 750 ft
- SHELL FOOD MARTUnderground Storage Tanks · 750 ft
- CVS PHARMACY 6878Brownfields · 900 ft
- LINE WAREHOUSEUnderground Storage Tanks · 1100 ft
- BUEHLERS BUY LOW 450Underground Storage Tanks · 1800 ft
- MAINTENANCE SHOP 19 ARMY NATIONAL GUARDUnderground Storage Tanks · 2300 ft
- IN STATE OF ORG MAINT SHOP 19 ARMY NGBrownfields · 2300 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Jasper'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 Jasper.
Total Sites
254
within ~10 miles of Jasper
Risk Level
Elevated
Highest-severity
2 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Jasper
Severity Distribution
within ~10 miles of Jasper
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Jasper, two things run higher than the national average within ~10 miles of Jasper — Toxics Release Inventory (45 sites) and PFAS (4 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.
PFAS: PFAS (per- and polyfluoroalkyl substances) are called "forever chemicals" because they do not biodegrade.
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Test irrigation water source — this is the primary pathway for PFAS to reach garden crops.
Check your specific parcel in Jasper
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 Jasper average
Your land is one point inside Jasper
Everything above resolves to Jasper as a whole — one PHZM band and one 28°F frost record, read across 9K 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 Jasper Average
Jasper Average
- ●USDA Zones 6b, averaged across Jasper
- ●One soil character for all of Jasper
- ●Frost dates read at Jasper's scale: Mar 31 to Nov 5
YOUR Parcel
- ✓Your exact zone, not Jasper's 6b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Jasper
Pull a site-specific report for your exact address in Jasper, Indiana — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Jasper averages can't show:
We read public map data around Jasper — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Jasper average
How we know this about Jasper
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 Jasper’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 Jasper
When does frost risk typically end in Jasper?
The last hard freeze (28°F) in Jasper typically lands around Mar 31, 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 21.
When is the first frost in Jasper?
The first hard freeze (28°F) in Jasper typically arrives around Nov 5, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 22, so the watching starts about Oct 6 — about 219 days after the spring freeze cleared.
How long is the growing season in Jasper?
Measured between 28°F hard freezes, Jasper sees about 219 frost-free days — roughly Mar 31 through Nov 5, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 21 to Oct 22, about 184 days.
Is the soil safe to grow vegetables in Jasper?
The federal record around Jasper is a meaningful one — 254 documented sites, mostly Underground Storage Tanks entries (136), 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 Jasper?
From about Oct 6 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 5 (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 5. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Jasper's scale — its 6b band and its 219-day season. Your yard writes its own version of Jasper'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 Jasper’s own scale
7 of the readings below were taken at Jasper's own scale — its own ~219-day season between 28°F freezes, the 8,511 acres it covers and 254 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Jasper's own USDA hardiness band, zones 6bUSDA PHZM 2023
- Jasper's own 28°F hard-freeze dates, about Mar 31 and Nov 5 and the ~219-day span between themNOAA 1991–2020 Climate Normals
- 254 documented contamination sites on the federal record near Jasper, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- Jasper's boundary and the 8,511 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6b and a ~219-day seasonGrowable Ground crop-matching engine
- Jasper sits in the Interior River Valleys and Hills — not the ecoregion its county mostly readsUS EPA Level III Ecoregions
- Lanternfly survey cells around Jasper 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 Jasper's 8,511 acres read through its county's SSURGO summaryfrom Dubois County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Dubois 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 Dubois County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Jasper's 8,511 acreswhy one lot differs from the next →
- Which side of Jasper you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 8,511 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 Jasper-wide figureread your own land →