Lynn, 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.
These conditions suit cabbage, hazelnut, lavender, and collard greens — a starting list any specific site will trim or extend with its own soil, sun, and drainage.
Even in Lynn, 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 Lynn 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 Lynn — soil, climate, flood, and parcel records. How we handle your address.
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Lynn — the short answer
Lynn, Indiana: USDA zone 6a, about 205 days between hard freezes, across 362 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)
- Nov 1
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~205
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 362 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 Lynn's average, not your lot's — a low corner or a tree line moves it. Against Lynn's 205-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Lynn
Each reading below is measured for Lynn itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredLynn runs about 205 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
MeasuredLynn 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 Lynn is in
Lynn sits in the Eastern Corn Belt Plains — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Lynn's own centroid rather than borrowed from Randolph County.
What Grows in Lynn
Every plant below cleared Lynn's own zone 6a and its 205-day season. Each card opens that plant's Indiana profile. How we score.
Is it too late to plant in Lynn?
Too late for some crops, right on time for others — a growing season is a sequence, not a deadline. 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 Nov 1 — 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 Lynn
Survey cells within 31 miles of Lynn checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 57 miles off. What to watch for.
What's on the federal record near Lynn
Closest first, within ~10 miles of Lynn. Listing isn't leaking, and distance isn't exposure.
- ASTRAL INDUSTRIES INC PLANT #3Toxics Release Inventory · 600 ft
- T & S PANTRIESUnderground Storage Tanks · 700 ft
- THORNBURG SUPERMARKETUnderground Storage Tanks · 900 ft
- ASTRAL INDUSTRIES INC PLANT 4Toxics Release Inventory · 1100 ft
- RANDOLPH SOUTHERN SCHOOL CORPORATIONUnderground Storage Tanks · 1500 ft
- Flying Sauser Fuel StopUnderground Storage Tanks · 2200 ft
- ASTRAL INDUSTRIES INCORPORATED PLANT 4Underground Storage Tanks · 2300 ft
- F SYSTEMS INCORPORATEDBrownfields · 2400 ft
- PANHANDLE EASTERN PIPE LINE M & RBrownfields · 0.5 mi
- WILBERT FUNERAL SERVICES - ASTRALBrownfields · 0.7 mi
- LYNN MUNICIPAL WASTE WATER TREATMENT PLANTUnderground Storage Tanks · 1.1 mi
- MATTHEWS INT`L CORP LYNN CASKET FACILITYToxics Release Inventory · 2.5 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Lynn'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 Lynn.
Total Sites
108
within ~10 miles of Lynn
Risk Level
Elevated
Highest-severity
4 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Lynn
Severity Distribution
within ~10 miles of Lynn
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Lynn, two things run higher than the national average within ~10 miles of Lynn — Superfund (4 sites) and Toxics Release Inventory (12 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 Lynn
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 Lynn average
Your land is one point inside Lynn
Everything above resolves to Lynn as a whole — one PHZM band and one 28°F frost record, read across 362 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 Lynn Average
Lynn Average
- ●USDA Zones 6a, averaged across Lynn
- ●One soil character for all of Lynn
- ●Frost dates read at Lynn's scale: Apr 10 to Nov 1
YOUR Parcel
- ✓Your exact zone, not Lynn's 6a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Lynn
Pull a site-specific report for your exact address in Lynn, Indiana — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Lynn averages can't show:
We read public map data around Lynn — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Lynn average
How we know this about Lynn
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 Lynn’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 Lynn
When does frost risk typically end in Lynn?
The last hard freeze (28°F) in Lynn 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 Lynn?
The first hard freeze (28°F) in Lynn typically arrives around Nov 1, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 18, so the watching starts about Oct 2 — about 205 days after the spring freeze cleared.
How long is the growing season in Lynn?
Measured between 28°F hard freezes, Lynn sees about 205 frost-free days — roughly Apr 10 through Nov 1, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 1 to Oct 18, about 170 days.
Is the soil safe to grow vegetables in Lynn?
The federal record around Lynn is a meaningful one — 108 documented sites, mostly Underground Storage Tanks entries (60), the nearest Toxics Release Inventory 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 Lynn?
From about Oct 2 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 1 (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 1. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Lynn's scale — its 6a band and its 205-day season. Your yard writes its own version of Lynn'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 Lynn’s own scale
7 of the readings below were taken at Lynn's own scale — its own ~205-day season between 28°F freezes, the 362 acres it covers and 108 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Lynn's own USDA hardiness band, zones 6aUSDA PHZM 2023
- Lynn's own 28°F hard-freeze dates, about Apr 10 and Nov 1 and the ~205-day span between themNOAA 1991–2020 Climate Normals
- 108 documented contamination sites on the federal record near Lynn, the closest Toxics Release Inventory record about 0.1 miles out from the town centreFederal environmental registers
- Lynn's boundary and the 362 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6a and a ~205-day seasonGrowable Ground crop-matching engine
- The ecoregion at Lynn's own centroid, the Eastern Corn Belt PlainsUS EPA Level III Ecoregions
- Lanternfly survey cells around Lynn 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 Lynn's 362 acres read through its county's SSURGO summaryfrom Randolph County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Randolph 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 Randolph County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Lynn's 362 acreswhy one lot differs from the next →
- Which side of Lynn you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 362 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Toxics Release Inventory 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 Lynn-wide figureread your own land →
More in Indiana
Wider growing context
What grows across IndianaLynn sits outside our named growing regions, so Indiana as a whole is its closest context here.
Nearby growing guides