New Harmony, Indiana, sits in USDA hardiness zone 7a — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
Expect cabbage, hazelnut, california poppy, and collard greens to be strong candidates here; the deciding factors on any one parcel stay local — soil, sun, and drainage.
Even in New Harmony, 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 New Harmony 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 New Harmony — soil, climate, flood, and parcel records. How we handle your address.
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New Harmony — the short answer
New Harmony, Indiana: USDA zone 7a, about 228 days between hard freezes, across 522 acres of town.
- USDA zone
- 7a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Mar 26
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 9
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~228
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 522 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 7a is New Harmony's average, not your lot's — a low corner or a tree line moves it. Against New Harmony's 228-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in New Harmony
Each reading below is measured for New Harmony itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredNew Harmony runs about 228 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
MeasuredNew Harmony sits in USDA hardiness zone 7a.
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 New Harmony is in
New Harmony sits in the Interior River Valleys and Hills — EPA Level III, inside the wider Eastern Temperate Forests. That is read at New Harmony's own centroid rather than borrowed from Posey County.
What Grows in New Harmony
Every plant below cleared New Harmony's own zone 7a and its 228-day season. Each card opens that plant's Indiana profile. How we score.
Is it too late to plant in New Harmony?
Usually not — gardeners here simply switch what goes in the ground as the season moves. Cool-season crops can go in from around Feb 26; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 26 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 9 — long-season crops need about 90 days of runway, quick greens only 30. Here the season winds down slowly: late sowings, a real autumn harvest, and garlic in the ground before the first hard freeze.
Documented around New Harmony
Survey cells within 31 miles of New Harmony checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 151 miles off. What to watch for.
What's on the federal record near New Harmony
Closest first, within ~10 miles of New Harmony. Listing isn't leaking, and distance isn't exposure.
- NEW HARMONY MUNICIPLE GARAGEUnderground Storage Tanks · 200 ft
- MarathonUnderground Storage Tanks · 600 ft
- OLD MILL MART INCORPORATEDUnderground Storage Tanks · 1900 ft
- POSEY 3 (PY 3)Nitrate · 0.6 mi
- HARMONIE STATE RECREATION AREAUnderground Storage Tanks · 1.4 mi
- WASSON Q 1Underground Storage Tanks · 2.0 mi
- ROYSTER CLARK INCORPORATEDUnderground Storage Tanks · 2.0 mi
- PY-10 NEW HARMONY, IND.Nitrate · 3.2 mi
- 005N014W24A001Nitrate · 3.2 mi
- 005S0014W23L01Nitrate · 3.7 mi
- PY-2 NEW HARMONY, IND.Nitrate · 3.8 mi
- STALLINGS NEW HARMONY INNitrate · 4.0 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from New Harmony'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 New Harmony.
Total Sites
115
within ~10 miles of New Harmony
Risk Level
Elevated
Highest-severity
1 Superfund site (none NPL-listed)
Sources Checked
within ~10 miles of New Harmony
Severity Distribution
within ~10 miles of New Harmony
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around New Harmony, Nitrate runs higher than the national average — 36 sites within ~10 miles of New Harmony. Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
Nitrate: Nitrate contamination primarily comes from agricultural fertilizer runoff and failing septic systems.
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Check your specific parcel in New Harmony
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 New Harmony average
Your land is one point inside New Harmony
Everything above resolves to New Harmony as a whole — one PHZM band and one 28°F frost record, read across 522 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 New Harmony Average
New Harmony Average
- ●USDA Zones 7a, averaged across New Harmony
- ●One soil character for all of New Harmony
- ●Frost dates read at New Harmony's scale: Mar 26 to Nov 9
YOUR Parcel
- ✓Your exact zone, not New Harmony's 7a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in New Harmony
Pull a site-specific report for your exact address in New Harmony, Indiana — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that New Harmony averages can't show:
We read public map data around New Harmony — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the New Harmony average
How we know this about New Harmony
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 New Harmony’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 New Harmony
When does frost risk typically end in New Harmony?
The last hard freeze (28°F) in New Harmony typically lands around Mar 26, 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 16.
When is the first frost in New Harmony?
The first hard freeze (28°F) in New Harmony typically arrives around Nov 9, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 26, so the watching starts about Oct 10 — about 228 days after the spring freeze cleared.
How long is the growing season in New Harmony?
Measured between 28°F hard freezes, New Harmony sees about 228 frost-free days — roughly Mar 26 through Nov 9, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 16 to Oct 26, about 193 days.
Is the soil safe to grow vegetables in New Harmony?
The federal record around New Harmony is a meaningful one — 115 documented sites, mostly Underground Storage Tanks entries (68), 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 New Harmony?
From about Oct 10 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 9 (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 9. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at New Harmony's scale — its 7a band and its 228-day season. Your yard writes its own version of New Harmony'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 New Harmony’s own scale
7 of the readings below were taken at New Harmony's own scale — its own ~228-day season between 28°F freezes, the 522 acres it covers and 115 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- New Harmony's own USDA hardiness band, zones 7aUSDA PHZM 2023
- New Harmony's own 28°F hard-freeze dates, about Mar 26 and Nov 9 and the ~228-day span between themNOAA 1991–2020 Climate Normals
- 115 documented contamination sites on the federal record near New Harmony, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- New Harmony's boundary and the 522 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 7a and a ~228-day seasonGrowable Ground crop-matching engine
- The ecoregion at New Harmony's own centroid, the Interior River Valleys and HillsUS EPA Level III Ecoregions
- Lanternfly survey cells around New Harmony 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 New Harmony's 522 acres read through its county's SSURGO summaryfrom Posey County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Posey 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 Posey County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among New Harmony's 522 acreswhy one lot differs from the next →
- Which side of New Harmony you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 522 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 New Harmony-wide figureread your own land →
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