Ambia, Indiana, sits in USDA hardiness zone 6a — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
Expect cabbage, hazelnut, lavender, and collard greens to be strong candidates here; the deciding factors on any one parcel stay local — soil, sun, and drainage.
Even in Ambia, 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 Ambia 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 Ambia — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Ambia — the short answer
Ambia, Indiana: USDA zone 6a, about 196 days between hard freezes, across 97 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)
- Oct 23
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~196
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 97 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 Ambia's average, not your lot's — a low corner or a tree line moves it. Against Ambia's 196-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Ambia
Each reading below is measured for Ambia itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredAmbia runs about 196 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
MeasuredAmbia 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 Ambia is in
Ambia sits in the Central Corn Belt Plains — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Ambia's own centroid rather than borrowed from Benton County.
What Grows in Ambia
Every plant below cleared Ambia's own zone 6a and its 196-day season. Each card opens that plant's Indiana profile. How we score.
Is it too late to plant in Ambia?
Almost never — the real question is what to plant next. 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 Oct 23 — long-season crops need about 90 days of runway, quick greens only 30. As the window narrows, the plantings just get faster — fall brassicas, then greens, then garlic to finish.
Documented around Ambia
Survey cells within 31 miles of Ambia checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 63 miles off. What to watch for.
What's on the federal record near Ambia
Closest first, within ~10 miles of Ambia. Listing isn't leaking, and distance isn't exposure.
- TRUNKLINE GAS COMPRESSOR STATIONBrownfields · 2.2 mi
- Trunkline Gas CompanyUnderground Storage Tanks · 2.2 mi
- Alltel IllinoisincUnderground Storage Tanks · 3.9 mi
- Car ShopUnderground Storage Tanks · 3.9 mi
- Chisms CornerUnderground Storage Tanks · 3.9 mi
- Calcium Products Incorporated Div Irving Materials IncorporatedUnderground Storage Tanks · 4.4 mi
- NUTRIEN AG SOLUTIONSBrownfields · 4.5 mi
- C I Ag IncUnderground Storage Tanks · 6.7 mi
- KACHINA CONSULTING LLC D.B.A. AUXILIUS RENEWABLE ENERGY LLCBrownfields · 7.1 mi
- BOSWELL ELEMENTARY SCHOOLUnderground Storage Tanks · 7.1 mi
- BOSWELL TOWNUnderground Storage Tanks · 7.3 mi
- SCHUMACHER ELECTRIC CORPToxics Release Inventory · 7.4 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Ambia'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 Ambia.
Total Sites
74
within ~10 miles of Ambia
Risk Level
Elevated
Highest-severity
2 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Ambia
Severity Distribution
within ~10 miles of Ambia
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Ambia, Underground Storage Tanks runs higher than the national average — 49 sites within ~10 miles of Ambia. That's not a problem with your land — it's information about it.
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 Ambia
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 Ambia average
Your land is one point inside Ambia
Everything above resolves to Ambia as a whole — one PHZM band and one 28°F frost record, read across 97 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 Ambia Average
Ambia Average
- ●USDA Zones 6a, averaged across Ambia
- ●One soil character for all of Ambia
- ●Frost dates read at Ambia's scale: Apr 10 to Oct 23
YOUR Parcel
- ✓Your exact zone, not Ambia's 6a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Ambia
Pull a site-specific report for your exact address in Ambia, Indiana — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Ambia averages can't show:
We read public map data around Ambia — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Ambia average
How we know this about Ambia
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 Ambia’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 Ambia
When does frost risk typically end in Ambia?
The last hard freeze (28°F) in Ambia 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 Ambia?
The first hard freeze (28°F) in Ambia typically arrives around Oct 23, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 9, so the watching starts about Sep 23 — about 196 days after the spring freeze cleared.
How long is the growing season in Ambia?
Measured between 28°F hard freezes, Ambia sees about 196 frost-free days — roughly Apr 10 through Oct 23, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 1 to Oct 9, about 161 days.
Is the soil safe to grow vegetables in Ambia?
The federal record around Ambia is a meaningful one — 74 documented sites, mostly Underground Storage Tanks entries (49), the nearest Brownfields record about 2.2 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 Ambia?
From about Sep 23 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 23 (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 23. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Ambia's scale — its 6a band and its 196-day season. Your yard writes its own version of Ambia'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 Ambia’s own scale
7 of the readings below were taken at Ambia's own scale — its own ~196-day season between 28°F freezes, the 97 acres it covers and 74 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Ambia's own USDA hardiness band, zones 6aUSDA PHZM 2023
- Ambia's own 28°F hard-freeze dates, about Apr 10 and Oct 23 and the ~196-day span between themNOAA 1991–2020 Climate Normals
- 74 documented contamination sites on the federal record near Ambia, the closest Brownfields record about 2.2 miles out from the town centreFederal environmental registers
- Ambia's boundary and the 97 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6a and a ~196-day seasonGrowable Ground crop-matching engine
- The ecoregion at Ambia's own centroid, the Central Corn Belt PlainsUS EPA Level III Ecoregions
- Lanternfly survey cells around Ambia 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 Ambia's 97 acres read through its county's SSURGO summaryfrom Benton County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Benton 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 Benton County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Ambia's 97 acreswhy one lot differs from the next →
- Which side of Ambia you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 97 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields record about 2.2 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 Ambia-wide figureread your own land →
More in Indiana
Wider growing context
What grows across IndianaAmbia sits outside our named growing regions, so Indiana as a whole is its closest context here.
Nearby growing guides