Hillsdale, Michigan, sits in USDA hardiness zone 6a — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
Crops well matched to these conditions include cabbage, hazelnut, lavender, and collard greens — though what thrives on any one site still turns on its specific soil, sun, and drainage.
Even in Hillsdale, 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 Hillsdale 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 Hillsdale — soil, climate, flood, and parcel records. How we handle your address.
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Hillsdale — the short answer
Hillsdale, Michigan: USDA zone 6a, about 190 days between hard freezes, across 4K acres of city.
- USDA zone
- 6a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 17
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 24
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~190
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City 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 Hillsdale's average, not your lot's — a low corner or a tree line moves it. Against Hillsdale's 190-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Hillsdale
Each reading below is measured for Hillsdale itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredHillsdale runs about 190 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
MeasuredHillsdale 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 Hillsdale is in
Hillsdale sits in the Southern Michigan/Northern Indiana Drift Plains — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Hillsdale's own centroid rather than borrowed from Hillsdale County.
What Grows in Hillsdale
Every plant below cleared Hillsdale's own zone 6a and its 190-day season. Each card opens that plant's Michigan profile. How we score.
Is it too late to plant in Hillsdale?
For most of the year, no — what changes is which crops still fit the days remaining. Cool-season crops can go in from around Mar 20; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 17 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 24 — long-season crops need about 90 days of runway, quick greens only 30. Even past midsummer there is room for a true fall garden here, and garlic planted near the close carries the momentum into next year.
Documented around Hillsdale
Survey cells within 31 miles of Hillsdale checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 52 miles off. What to watch for.
What's on the federal record near Hillsdale
Closest first, within ~10 miles of Hillsdale. Listing isn't leaking, and distance isn't exposure.
- Admiral Petroleum Co #141Underground Storage Tanks · 500 ft
- United #6154Underground Storage Tanks · 500 ft
- CLARK OIL COBrownfields · 500 ft
- Michigan Gas UtilitiesUnderground Storage Tanks · 600 ft
- PS Food MartUnderground Storage Tanks · 800 ft
- APC STORES INCBrownfields · 800 ft
- Leutheuser Motors IncUnderground Storage Tanks · 850 ft
- SUD Z DRY CLEANERSBrownfields · 1100 ft
- Hillsdale Kwik StopUnderground Storage Tanks · 1200 ft
- WALGREEN COBrownfields · 1200 ft
- Wells ShellUnderground Storage Tanks · 1200 ft
- HILLSDALE CAR WASHBrownfields · 1200 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Hillsdale'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 Hillsdale.
Total Sites
258
within ~10 miles of Hillsdale
Risk Level
Elevated
Highest-severity
1 Superfund site (none NPL-listed)
Sources Checked
within ~10 miles of Hillsdale
Severity Distribution
within ~10 miles of Hillsdale
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Hillsdale, Toxics Release Inventory runs higher than the national average — 21 sites within ~10 miles of Hillsdale. That's not a problem with your land — it's information about it.
Toxics Release Inventory: TRI facilities report annual chemical releases to air, water, and land.
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Check your specific parcel in Hillsdale
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 Hillsdale average
Your land is one point inside Hillsdale
Everything above resolves to Hillsdale 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 city 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 Hillsdale Average
Hillsdale Average
- ●USDA Zones 6a, averaged across Hillsdale
- ●One soil character for all of Hillsdale
- ●Frost dates read at Hillsdale's scale: Apr 17 to Oct 24
YOUR Parcel
- ✓Your exact zone, not Hillsdale's 6a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Hillsdale
Pull a site-specific report for your exact address in Hillsdale, Michigan — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Hillsdale averages can't show:
We read public map data around Hillsdale — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Hillsdale average
How we know this about Hillsdale
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at this city’s own centroid; hard-freeze dates from NOAA 1991–2020 28°F normals at Hillsdale’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 city grain anywhere on this page — there is no city-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 Hillsdale
When does frost risk typically end in Hillsdale?
The last hard freeze (28°F) in Hillsdale typically lands around Apr 17, 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 8.
When is the first frost in Hillsdale?
The first hard freeze (28°F) in Hillsdale typically arrives around Oct 24, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 10, so the watching starts about Sep 24 — about 190 days after the spring freeze cleared.
How long is the growing season in Hillsdale?
Measured between 28°F hard freezes, Hillsdale sees about 190 frost-free days — roughly Apr 17 through Oct 24, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 8 to Oct 10, about 155 days.
Is the soil safe to grow vegetables in Hillsdale?
The federal record around Hillsdale is a meaningful one — 258 documented sites, mostly Underground Storage Tanks entries (140), 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 Hillsdale?
From about Sep 24 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 24 (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 24. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Hillsdale's scale — its 6a band and its 190-day season. Your yard writes its own version of Hillsdale'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 Hillsdale’s own scale
7 of the readings below were taken at Hillsdale's own scale — its own ~190-day season between 28°F freezes, the 3,644 acres it covers and 258 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Hillsdale's own USDA hardiness band, zones 6aUSDA PHZM 2023
- Hillsdale's own 28°F hard-freeze dates, about Apr 17 and Oct 24 and the ~190-day span between themNOAA 1991–2020 Climate Normals
- 258 documented contamination sites on the federal record near Hillsdale, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- Hillsdale's boundary and the 3,644 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6a and a ~190-day seasonGrowable Ground crop-matching engine
- The ecoregion at Hillsdale's own centroid, the Southern Michigan/Northern Indiana Drift PlainsUS EPA Level III Ecoregions
- Lanternfly survey cells around Hillsdale 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 Hillsdale's 3,644 acres read through its county's SSURGO summaryfrom Hillsdale County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Hillsdale County
- The growing challenges every Michigan grower plans around — written at state scale, so they stay on the state guidefrom Michigan
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Hillsdale County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Hillsdale's 3,644 acreswhy one lot differs from the next →
- Which side of Hillsdale you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 3,644 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 Hillsdale-wide figureread your own land →
More in Michigan
Wider growing context
What grows across MichiganHillsdale sits outside our named growing regions, so Michigan as a whole is its closest context here.
Nearby growing guides