Berrien County, in Michigan, sits in USDA hardiness zone 6a — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
These conditions suit cabbage, blueberry, lavender, and collard greens — a starting list any specific site will trim or extend with its own soil, sun, and drainage.
Berrien County lies within the Southwest Michigan Wine Coast — a regional growing area with its own character.
Grounded in USDA PHZM 2023 · Growable Ground suitability scoring · NOAA 1991–2020 Climate Normals
Berrien County holds more than one microclimate.
Soils and elevations shift across Berrien County, so your frost dates and drainage aren't the county average. 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 Berrien County — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Berrien County — the short answer
Berrien County, Michigan: USDA zone 6a, about 223 days between hard freezes, across 363K acres.
- USDA zone
- 6a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 6
- NOAA 1991–2020 Climate Normals, 28°F
- First hard freeze (28°F)
- Nov 15
- NOAA 1991–2020 Climate Normals, 28°F
- Days between freezes
- ~223
- NOAA 1991–2020 Climate Normals, 28°F
- County area
- 363K acres
- US Census TIGER/Line 2025
Every figure names the dataset it came from. Hard-freeze dates are county 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 Berrien County's average, not your lot's — a low corner or a tree line moves it. Against Berrien County's 223-day season, see what your own ground reads.
Heat in Berrien County
Across a year, Berrien County accumulates about 2,718 growing degree days above 50°F, about 618 more than the middle Michigan county — ahead of 79 of Michigan’s 83 counties. Degree days are the heat a crop actually gets to work with — more of them is more room to ripen a long-season crop before the freeze closes the window.
Grounded in PRISM Climate Group, Oregon State University — 1991–2020 monthly normals
Soil in Berrien County
Across Berrien County, the ground is predominantly Alfisols, where Oshtemo, Riddles, and Spinks are the most extensive named soil series. The soil is generally well drained with a loam surface. Topsoil pH runs about 6.0–6.5, slightly acidic. Rainfall drains through hydrologic group A soils.
Soil order
Alfisols
Drainage
Well drained
Prime farmland
20%
Hydric soils
18%
Soil still varies lot by lot — soil types explained.
How the ground varies across Berrien County
The USDA soil survey maps 41% of Berrien County as well drained — but another 55% drains differently: 31% somewhat poorly drained, 12% poorly drained.
Oshtemo is the most extensive named soil at 15% of mapped acres, then Riddles (10%) and Spinks (9%).
Which of them your own lot sits on is a parcel question, not a county one. Check your address for the survey at your boundary.
What this means for growing in Berrien County
Each reading below is measured for Berrien County itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Drainage
MeasuredThe dominant soils across Berrien County are well drained, in hydrologic group A — ground that drains quickly.
The upside is soil you can work early in spring and roots that never drown; the cost is that fast-draining ground dries out fast and leaches nutrients away before plants can use them.
Work in compost and mulch to hold moisture and feed, and water more often in short doses than deep and rarely.
USDA NRCS SSURGO
Surface pH
MeasuredTopsoil across Berrien County runs about pH 6.0–6.5, close to neutral.
This is the range most vegetables prefer — one correction you probably do not have to make, which is genuinely good news for a new bed.
Keep it there with compost rather than lime or sulfur, and only amend if your own soil test says otherwise.
USDA NRCS SSURGO
Wet ground
MeasuredAbout 18% of Berrien County is mapped as hydric — wetland — soil.
If your lot falls in one of those pockets, a standard in-ground bed will fight waterlogging all season, and roots that need air will struggle.
Check how your own ground drains before you dig; raised beds or moisture-loving plantings turn a wet corner from a problem into a niche.
USDA NRCS SSURGO
Season length
MeasuredBerrien County runs about 223 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
The kind of country Berrien County is in
Berrien County sits in the Southern Michigan/Northern Indiana Drift Plains — EPA Level III, inside the wider Eastern Temperate Forests. One consistent ecological setting across the whole county.
What Grows in Berrien County
We scored all 1,086 plants against Berrien County's own USDA zone 6a and its own 223-day season between hard freezes, using the same matching engine that runs a full parcel report. These cleared both. Sun, soil pH and drainage vary lot by lot — those are the parcel questions below. Each card opens that plant's Michigan profile.
Is it too late to plant in Berrien County?
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 9; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 6 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 15 — 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 Berrien County
Spotted lanternfly documented 20 miles from Berrien County, first recorded 2023. What to watch for.
- Japanese beetle8 documented records
- monarch butterfly141 documented records
Sighting records, so they follow observers as much as insects.
What gets applied to farmland in Berrien County
USGS estimates 109,147 lb of Glyphosate on Berrien County farmland in 2019, its largest by weight, ahead of Acetochlor (35,625 lb) and Atrazine (27,242 lb).
Farmland across the whole county, not any one lot. Check your address for the site-by-site record.
Safe to Grow Here?
What the federal record shows across Berrien County — and how to grow with it.
We checked the federal record across Berrien County — 1,235 documented sites across 6 of the 9 source types we track.
The most significant on record: 21 Superfund sites. Sites tracked in EPA's Superfund program — from assessment-stage CERCLIS entries to confirmed National Priorities List cleanup sites.
Berrien County carries one of the heavier federal records we track — and that's not a verdict on your yard. Proximity to a documented site is information, not a diagnosis: nothing here says any particular parcel is affected. It does earn one concrete step — before food beds go in the ground, a professional soil test tells you exactly what you're working with, and raised beds with clean imported soil grow well almost anywhere in the meantime.
Sources: EPA, USGS — 1.8M documented sites tracked nationwide across 9 federal source types.
What's on the federal record near Berrien County
Closest first, across Berrien County. Listing isn't leaking, and distance isn't exposure.
- New Buffalo Area SchoolsUnderground Storage Tanks · 200 ft
- Bible Baptist ChurchUnderground Storage Tanks · 900 ft
- Harbor Country Banking-new BuffaUnderground Storage Tanks · 1000 ft
- Outpost SportsUnderground Storage Tanks · 1000 ft
- Eggert's ServiceUnderground Storage Tanks · 1000 ft
- Bud & ElsiesUnderground Storage Tanks · 1000 ft
- Knoll BrothersUnderground Storage Tanks · 1100 ft
- Former Sunshine Fruit CoUnderground Storage Tanks · 1100 ft
- City Of New BuffaloUnderground Storage Tanks · 1200 ft
- Impatient Two Sport ShopUnderground Storage Tanks · 1200 ft
- Galien River Sanitary DistrictUnderground Storage Tanks · 1400 ft
- New Buffalo Lakeside CoUnderground Storage Tanks · 1400 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Berrien County'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 Berrien County.
Sources Checked
across Berrien County
Severity Distribution
across Berrien County
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Berrien County, two things run higher than the national average across Berrien County — Superfund (21 sites) and Toxics Release Inventory (81 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 Berrien County
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 Berrien County average
Your land is one point inside Berrien County
Everything above resolves to Berrien County as a whole — one PHZM band and one county frost record, read across 363K 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 county 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 county average.
Your Lot vs the Berrien County Average
Berrien County Average
- ●USDA Zones 6a, averaged across Berrien County
- ●One soil character for all of Berrien County
- ●Frost dates read at Berrien County's scale: Apr 6 to Nov 15
YOUR Parcel
- ✓Your exact zone, not Berrien County's 6a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your parcel in Berrien County
Pull a site-specific report for your exact address in Berrien County, Michigan — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Berrien County averages can't show:
We read public map data around Berrien County — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Berrien County average
How we know this about Berrien County
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at county grain; hard-freeze dates from NOAA 1991–2020 28°F normals at this county’s own record where one resolves, and the labelled statewide window where none does; soils from the USDA NRCS SSURGO survey, area-weighted across the county’s own map units; boundaries and acreage from US Census TIGER/Line 2025; the contamination and pesticide records from the federal sources named in their beats above. Where Berrien County carries no record of its own, the figure is inherited and labelled — the resolution ledger below names each.
Common questions about Berrien County
When does frost risk typically end in Berrien County?
The last hard freeze (28°F) in Berrien County typically lands around Apr 6, 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 27.
How long is the growing season in Berrien County?
Measured between 28°F hard freezes, Berrien County sees about 223 frost-free days — roughly Apr 6 through Nov 15, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 27 to Nov 1, about 188 days.
Is the soil safe to grow vegetables in Berrien County?
The federal record around Berrien County runs heavier than most — 1,235 documented sites, mostly Underground Storage Tanks entries (668), the nearest Underground Storage Tanks record under a tenth of a mile out — so test the soil before planting food in the ground, and raised beds with clean imported soil grow well in the meantime. Even here, proximity to a documented site is information, not a diagnosis of any one yard; the contamination map shows exactly what's recorded and where.
Everything above is measured at Berrien County's scale — its 6a band and its 223-day season. Your yard writes its own version of Berrien County's numbers: we read soil, sun, drainage and frost at your exact address. Try it for 14 days — no card required.
Will It Grow Here?
Zone fit is the first question — each answer below reads Michigan's frost window, season length, and soil profile against the plant's real requirements.
What this page reads at Berrien County’s own scale
9 of the readings below were taken at Berrien County's own scale — its own ~223-day span between 28°F freezes, the 3 most extensive soil series mapped here and 1,235 documented sites inside its boundary; one is borrowed from a wider read, named and linked below.
Measured here
- Berrien County's own USDA hardiness band, zones 6aUSDA PHZM 2023
- Berrien County's own 28°F hard-freeze dates and its ~223-day span between themNOAA 1991–2020 Climate Normals
- The soil order, drainage, surface pH, and the 3 most extensive named soil series mapped in Berrien CountyUSDA NRCS SSURGO
- 1,235 documented contamination sites inside the county boundary, distance-sorted from its center — the closest Underground Storage Tanks record under a tenth of a mile outFederal environmental registers
- Berrien County's boundary and the 363,420 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6a and a ~223-day seasonGrowable Ground crop-matching engine
- Berrien County sitting wholly inside the Southern Michigan/Northern Indiana Drift PlainsUS EPA Level III Ecoregions
- Open occurrence records documented in Berrien County for 2 tracked speciesGBIF derived datasets (CC0 / CC BY 4.0)
- Which agricultural compounds go onto Berrien County farmland, and roughly how muchUSGS NAWQA EPest county estimates
Inherited from a wider read
- The growing challenges every Michigan grower plans around — written at state scale, so they stay on the state guidefrom Michigan
What this page can’t tell you
- How the season shifts across Berrien County — the ~223 days above is one reading at its centre; the 12 towns below each carry their owntowns in this county →
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Berrien County's 363,420 acreswhy one lot differs from the next →
- Which of those 1,235 documented sites actually reaches your soil — that needs your address, the wind, and the groundwater directionhow we read the record →
- Where cold air settles, which slopes face the sun, and which way the wind runs on your own ground — none of it survives being averaged over Berrien Countyread your own land →