Vassar, Michigan, 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.
Reliable performers under these conditions include cabbage, blackberry, california poppy, and collard greens; what your own ground favors still comes down to its soil, sun, and drainage.
Even in Vassar, 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 Vassar 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 Vassar — soil, climate, flood, and parcel records. How we handle your address.
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Vassar — the short answer
Vassar, Michigan: USDA zone 6a, about 177 days between hard freezes, across 1K acres of city.
- USDA zone
- 6a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 24
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 18
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~177
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 1K 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 Vassar's average, not your lot's — a low corner or a tree line moves it. Against Vassar's 177-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Vassar
Each reading below is measured for Vassar itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredVassar runs about 177 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
MeasuredVassar 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 Vassar is in
Vassar sits in the Huron/Erie Lake Plains — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Vassar's own centroid rather than borrowed from Tuscola County.
What Grows in Vassar
Every plant below cleared Vassar's own zone 6a and its 177-day season. Each card opens that plant's Michigan profile. How we score.
Is it too late to plant in Vassar?
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 27; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 24 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 18 — long-season crops need about 90 days of runway, quick greens only 30. As the window narrows, the plantings just get faster — fall brassicas, then greens, then garlic to finish.
Documented around Vassar
Survey cells within 31 miles of Vassar checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 54 miles off. What to watch for.
What's on the federal record near Vassar
Closest first, within ~10 miles of Vassar. Listing isn't leaking, and distance isn't exposure.
- CLASSIC CARBIDE TOOL CORPBrownfields · 250 ft
- VASSAR DPWBrownfields · 550 ft
- Vassar D.p.wUnderground Storage Tanks · 550 ft
- Beacon & Bridge Market #22Underground Storage Tanks · 650 ft
- SPEEDWAY LLCBrownfields · 700 ft
- Speedway #8395Underground Storage Tanks · 750 ft
- TIERCON COMPONENTS, INC.Brownfields · 900 ft
- TIERCON COMPONENTS, INC.Toxics Release Inventory · 900 ft
- PARTS FINISHING GROUPToxics Release Inventory · 1200 ft
- VASSAR ACQUISITIONS LLCBrownfields · 1400 ft
- VASSAR ACQUISITIONS LLCToxics Release Inventory · 1400 ft
- Cook Oldsmobile Gmc IncUnderground Storage Tanks · 1700 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Vassar'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 Vassar.
Total Sites
169
within ~10 miles of Vassar
Risk Level
Moderate
Highest-severity
12 Toxics Release Inventory facilities
Sources Checked
within ~10 miles of Vassar
Severity Distribution
within ~10 miles of Vassar
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Vassar, Toxics Release Inventory runs higher than the national average — 12 sites within ~10 miles of Vassar. 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 Vassar
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 Vassar average
Your land is one point inside Vassar
Everything above resolves to Vassar as a whole — one PHZM band and one 28°F frost record, read across 1K 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 Vassar Average
Vassar Average
- ●USDA Zones 6a, averaged across Vassar
- ●One soil character for all of Vassar
- ●Frost dates read at Vassar's scale: Apr 24 to Oct 18
YOUR Parcel
- ✓Your exact zone, not Vassar's 6a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Vassar
Pull a site-specific report for your exact address in Vassar, Michigan — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Vassar averages can't show:
We read public map data around Vassar — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Vassar average
How we know this about Vassar
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 Vassar’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 Vassar
When does frost risk typically end in Vassar?
The last hard freeze (28°F) in Vassar typically lands around Apr 24, 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 15.
When is the first frost in Vassar?
The first hard freeze (28°F) in Vassar typically arrives around Oct 18, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 4, so the watching starts about Sep 18 — about 177 days after the spring freeze cleared.
How long is the growing season in Vassar?
Measured between 28°F hard freezes, Vassar sees about 177 frost-free days — roughly Apr 24 through Oct 18, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 15 to Oct 4, about 142 days.
Is the soil safe to grow vegetables in Vassar?
The federal record around Vassar shows 169 documented sites, mostly Underground Storage Tanks entries (93), the nearest Brownfields record under a tenth of a mile out — a typical footprint for a growing area, and proximity to a documented site is information, not a diagnosis of any one yard. It's worth seeing which recorded sites sit closest to where you grow, and testing the soil before new food beds near any of them.
How do I protect my plants from frost in Vassar?
From about Sep 18 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 18 (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 18. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Vassar's scale — its 6a band and its 177-day season. Your yard writes its own version of Vassar'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 Vassar’s own scale
7 of the readings below were taken at Vassar's own scale — its own ~177-day season between 28°F freezes, the 1,375 acres it covers and 169 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Vassar's own USDA hardiness band, zones 6aUSDA PHZM 2023
- Vassar's own 28°F hard-freeze dates, about Apr 24 and Oct 18 and the ~177-day span between themNOAA 1991–2020 Climate Normals
- 169 documented contamination sites on the federal record near Vassar, the closest Brownfields record under a tenth of a mile out from the town centreFederal environmental registers
- Vassar's boundary and the 1,375 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6a and a ~177-day seasonGrowable Ground crop-matching engine
- The ecoregion at Vassar's own centroid, the Huron/Erie Lake PlainsUS EPA Level III Ecoregions
- Lanternfly survey cells around Vassar 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 Vassar's 1,375 acres read through its county's SSURGO summaryfrom Tuscola County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Tuscola 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 Tuscola County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Vassar's 1,375 acreswhy one lot differs from the next →
- Which side of Vassar you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 1,375 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields 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 Vassar-wide figureread your own land →
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