Porter, Indiana, sits in USDA hardiness zone 6a — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
Crops well matched to these conditions include cabbage, blueberry, lavender, and collard greens — though what thrives on any one site still turns on its specific soil, sun, and drainage.
Even in Porter, 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 Porter 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 Porter — soil, climate, flood, and parcel records. How we handle your address.
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Porter — the short answer
Porter, Indiana: USDA zone 6a, about 220 days between hard freezes, across 4K 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 11
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~220
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 4K 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 Porter's average, not your lot's — a low corner or a tree line moves it. Against Porter's 220-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Porter
Each reading below is measured for Porter itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredPorter runs about 220 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
MeasuredPorter 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 Porter is in
Porter sits in the Southern Michigan/Northern Indiana Drift Plains — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Porter's own centroid, and it is not what its county reads: Porter County is mostly Central Corn Belt Plains. The wider page above you is answering a different question about different ground.
What Grows in Porter
Every plant below cleared Porter's own zone 6a and its 220-day season. Each card opens that plant's Indiana profile. How we score.
Is it too late to plant in Porter?
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 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 11 — long-season crops need about 90 days of runway, quick greens only 30. With a season this long, “too late” mostly means “switch crops” — second sowings and a full fall garden are the norm, with garlic closing the year.
Documented around Porter
Spotted lanternfly documented 1 miles from Porter, first recorded 2023. What to watch for.
What's on the federal record near Porter
Closest first, within ~10 miles of Porter. Listing isn't leaking, and distance isn't exposure.
- PORTER COUNTY BRIDGE 152Brownfields · 1600 ft
- USGS DUNES WELL 223 115 FTNitrate · 1600 ft
- IN DUNES NATL LAKESHORE-BAILLY COMFORT-TREATMENT PLANTToxics Release Inventory · 1800 ft
- IN DUNES NATL LAKESHORE-BAILLY COMFORT-TREATMENT PLANTBrownfields · 1800 ft
- USNPS INDIANA DUNES NATIONAL LAKESHOREUnderground Storage Tanks · 1800 ft
- SITE C-32 PORTER, IND.Nitrate · 1900 ft
- Northern Indiana Public Service Company Bailly Generating StationUnderground Storage Tanks · 0.5 mi
- INDIANA DUNES NATIONAL LAKESHOREBrownfields · 0.5 mi
- US ARMY CORP OF ENGINEERSBrownfields · 0.6 mi
- USGS DUNES WELL 224 55 FTNitrate · 0.7 mi
- DOLLAR GENERAL STORE 15021Brownfields · 0.8 mi
- YOST ELEMENTARY SCHOOLUnderground Storage Tanks · 0.8 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Porter'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 Porter.
Total Sites
806
within ~10 miles of Porter
Risk Level
Elevated
Highest-severity
13 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Porter
Severity Distribution
within ~10 miles of Porter
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Porter, two things run higher than the national average within ~10 miles of Porter — Nitrate (290 sites) and Superfund (13 sites). That's not a problem with your land — it's information about it.
Nitrate: Nitrate contamination primarily comes from agricultural fertilizer runoff and failing septic systems.
Superfund: Superfund sites represent the most severe contamination in the federal system.
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Check your specific parcel in Porter
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 Porter average
Your land is one point inside Porter
Everything above resolves to Porter as a whole — one PHZM band and one 28°F frost record, read across 4K 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 Porter Average
Porter Average
- ●USDA Zones 6a, averaged across Porter
- ●One soil character for all of Porter
- ●Frost dates read at Porter's scale: Apr 5 to Nov 11
YOUR Parcel
- ✓Your exact zone, not Porter's 6a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Porter
Pull a site-specific report for your exact address in Porter, Indiana — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Porter averages can't show:
We read public map data around Porter — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Porter average
How we know this about Porter
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 Porter’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 Porter
When does frost risk typically end in Porter?
The last hard freeze (28°F) in Porter 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 Porter?
The first hard freeze (28°F) in Porter typically arrives around Nov 11, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 28, so the watching starts about Oct 12 — about 220 days after the spring freeze cleared.
How long is the growing season in Porter?
Measured between 28°F hard freezes, Porter sees about 220 frost-free days — roughly Apr 5 through Nov 11, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 26 to Oct 28, about 185 days.
Is the soil safe to grow vegetables in Porter?
The federal record around Porter is a meaningful one — 806 documented sites, mostly Underground Storage Tanks entries (309), the nearest Brownfields record about 0.3 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 Porter?
From about Oct 12 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 11 (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 11. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Porter's scale — its 6a band and its 220-day season. Your yard writes its own version of Porter'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 Porter’s own scale
7 of the readings below were taken at Porter's own scale — its own ~220-day season between 28°F freezes, the 3,958 acres it covers and 806 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Porter's own USDA hardiness band, zones 6aUSDA PHZM 2023
- Porter's own 28°F hard-freeze dates, about Apr 5 and Nov 11 and the ~220-day span between themNOAA 1991–2020 Climate Normals
- 806 documented contamination sites on the federal record near Porter, the closest Brownfields record about 0.3 miles out from the town centreFederal environmental registers
- Porter's boundary and the 3,958 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6a and a ~220-day seasonGrowable Ground crop-matching engine
- Porter sits in the Southern Michigan/Northern Indiana Drift Plains — not the ecoregion its county mostly readsUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Porterlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Porter's 3,958 acres read through its county's SSURGO summaryfrom Porter County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Porter 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 Porter County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Porter's 3,958 acreswhy one lot differs from the next →
- Which side of Porter you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 3,958 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields record about 0.3 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 Porter-wide figureread your own land →