Schoolcraft County, in Michigan, sits in USDA hardiness zone 5b — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
Reliable performers under these conditions include cabbage, cranberry, lavender, and collard greens; what your own ground favors still comes down to its soil, sun, and drainage.
Schoolcraft County lies within the Upper Peninsula — a regional growing area with its own character.
Grounded in USDA PHZM 2023 · Growable Ground suitability scoring · NOAA 1991–2020 Climate Normals
Schoolcraft County holds more than one microclimate.
Soils and elevations shift across Schoolcraft 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 Schoolcraft County — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Schoolcraft County — the short answer
Schoolcraft County, Michigan: USDA zone 5b, about 161 days between hard freezes, across 750K acres.
- USDA zone
- 5b
- USDA PHZM 2023
- Last hard freeze (28°F)
- May 7
- NOAA 1991–2020 Climate Normals, 28°F
- First hard freeze (28°F)
- Oct 15
- NOAA 1991–2020 Climate Normals, 28°F
- Days between freezes
- ~161
- NOAA 1991–2020 Climate Normals, 28°F
- County area
- 750K 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 5b is Schoolcraft County's average, not your lot's — a low corner or a tree line moves it. Against Schoolcraft County's 161-day season, see what your own ground reads.
Heat in Schoolcraft County
Across a year, Schoolcraft County accumulates about 1,482 growing degree days above 50°F, about 618 fewer than the middle Michigan county — ahead of 6 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 Schoolcraft County
Across Schoolcraft County, the ground is predominantly Spodosols, where Markey, Rubicon, and Kalkaska are the most extensive named soil series. The soil is generally very poorly drained with a sand surface. Topsoil pH runs about 4.7–5.2, very strongly acidic. Rainfall drains through hydrologic group A/D soils.
Soil order
Spodosols
Drainage
Very poorly drained
Prime farmland
2%
Hydric soils
50%
Soil still varies lot by lot — soil types explained.
How the ground varies across Schoolcraft County
The USDA soil survey maps 34% of Schoolcraft County as very poorly drained — but another 62% drains differently: 14% poorly drained, 12% excessively drained.
Markey is the most extensive named soil at 13% of mapped acres, then Rubicon (11%) and Kalkaska (8%).
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 Schoolcraft County
Each reading below is measured for Schoolcraft 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 Schoolcraft County are very poorly drained, in hydrologic group A/D — ground that sheds water slowly.
Beds can stay saturated for days after heavy rain, and the roots of most vegetables, berries, and fruit trees suffocate or rot in soil that never drains.
Raised beds or mounded rows lift roots above the wet zone; choose water-tolerant crops for the lowest spots.
USDA NRCS SSURGO
Surface pH
MeasuredTopsoil across Schoolcraft County runs about pH 4.7–5.2, on the acidic side.
Blueberries, potatoes, and rhododendrons thrive in it, but most vegetables start locking out nutrients below about pH 6.0 and grow pale and stunted no matter how much you feed them.
A measured lime application raises pH for the crops that need it — but test first, because the right rate depends on your own soil, not the county average.
USDA NRCS SSURGO
Season length
MeasuredSchoolcraft County runs about 161 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
MeasuredSchoolcraft County sits in USDA hardiness zone 5b.
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 Schoolcraft County is in
Schoolcraft County sits in the Northern Lakes and Forests — EPA Level III, inside the wider Northern Forests. One consistent ecological setting across the whole county.
What Grows in Schoolcraft County
We scored all 1,086 plants against Schoolcraft County's own USDA zone 5b and its own 161-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 Schoolcraft County?
Rarely: the season closes in stages, not all at once, and each stage has its crops. Cool-season crops can go in from around Apr 9; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near May 7 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 15 — 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 Schoolcraft County
- monarch butterfly44 documented records
Sighting records, so they follow observers as much as insects.
What gets applied to farmland in Schoolcraft County
USGS estimates 1,702 lb of Glyphosate on Schoolcraft County farmland in 2019, its largest by weight, ahead of 2,4-d (397 lb) and Bromoxynil (345 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 Schoolcraft County — and how to grow with it.
We checked the federal record across Schoolcraft County — 121 documented sites across 5 of the 9 source types we track.
The most significant on record: 2 Superfund sites (none NPL-listed). Sites tracked in EPA's Superfund program — from assessment-stage CERCLIS entries to confirmed National Priorities List cleanup sites.
There's a meaningful federal record across Schoolcraft County — worth a look before you plant food, not a reason to hold back from growing. Proximity to a documented site is information, not a diagnosis of any one yard. A soil test before new food beds is the sensible precaution here, and the map shows exactly which sites sit where, so you can see what's actually near you.
Sources: EPA, USGS — 1.8M documented sites tracked nationwide across 9 federal source types.
What's on the federal record near Schoolcraft County
Closest first, across Schoolcraft County. Listing isn't leaking, and distance isn't exposure.
- BURNS METAL RECYCLINGBrownfields · 2.6 mi
- Robert W Davis SrUnderground Storage Tanks · 3.9 mi
- NORTHFORK CONSTRUCTION CO INCBrownfields · 3.9 mi
- Schoolcraft Ct Road CommissionUnderground Storage Tanks · 3.9 mi
- DnrUnderground Storage Tanks · 4.2 mi
- Manistique Water PlantUnderground Storage Tanks · 4.2 mi
- UP FABRICATING CO INCBrownfields · 4.5 mi
- Manistique ArmoryUnderground Storage Tanks · 4.5 mi
- Dpw - Public SafetyUnderground Storage Tanks · 4.5 mi
- CRYSTAL FLASH LIMITED PARTNERSHIP OF MICHIGANBrownfields · 4.6 mi
- Thompson Harbor MotelUnderground Storage Tanks · 4.7 mi
- Manistique Bulk PlantUnderground Storage Tanks · 4.7 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Schoolcraft 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 Schoolcraft County.
Total Sites
121
across Schoolcraft County
Risk Level
Elevated
Highest-severity
2 Superfund sites (none NPL-listed)
Sources Checked
across Schoolcraft County
Severity Distribution
across Schoolcraft County
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Schoolcraft County, Underground Storage Tanks runs higher than the national average — 75 sites across Schoolcraft County. It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
Underground Storage Tanks: Underground storage tanks are the single most common source of soil contamination near homes and gardens.
Use raised beds with imported soil — this eliminates the primary soil-contact pathway.
Check your specific parcel in Schoolcraft 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 Schoolcraft County average
Your land is one point inside Schoolcraft County
Everything above resolves to Schoolcraft County as a whole — one PHZM band and one county frost record, read across 750K 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 Schoolcraft County Average
Schoolcraft County Average
- ●USDA Zones 5b, averaged across Schoolcraft County
- ●One soil character for all of Schoolcraft County
- ●Frost dates read at Schoolcraft County's scale: May 7 to Oct 15
YOUR Parcel
- ✓Your exact zone, not Schoolcraft County's 5b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your parcel in Schoolcraft County
Pull a site-specific report for your exact address in Schoolcraft County, Michigan — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Schoolcraft County averages can't show:
We read public map data around Schoolcraft County — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Schoolcraft County average
How we know this about Schoolcraft 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 Schoolcraft County carries no record of its own, the figure is inherited and labelled — the resolution ledger below names each.
Common questions about Schoolcraft County
When does frost risk typically end in Schoolcraft County?
The last hard freeze (28°F) in Schoolcraft County typically lands around May 7, 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 28.
How long is the growing season in Schoolcraft County?
Measured between 28°F hard freezes, Schoolcraft County sees about 161 frost-free days — roughly May 7 through Oct 15, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 28 to Oct 1, about 126 days.
Is the soil safe to grow vegetables in Schoolcraft County?
The federal record around Schoolcraft County is a meaningful one — 121 documented sites, mostly Underground Storage Tanks entries (75), the nearest Brownfields record about 2.6 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.
Everything above is measured at Schoolcraft County's scale — its 5b band and its 161-day season. Your yard writes its own version of Schoolcraft 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 Schoolcraft County’s own scale
9 of the readings below were taken at Schoolcraft County's own scale — its own ~161-day span between 28°F freezes, the 3 most extensive soil series mapped here and 121 documented sites inside its boundary; one is borrowed from a wider read, named and linked below.
Measured here
- Schoolcraft County's own USDA hardiness band, zones 5bUSDA PHZM 2023
- Schoolcraft County's own 28°F hard-freeze dates and its ~161-day span between themNOAA 1991–2020 Climate Normals
- The soil order, drainage, surface pH, and the 3 most extensive named soil series mapped in Schoolcraft CountyUSDA NRCS SSURGO
- 121 documented contamination sites inside the county boundary, distance-sorted from its center — the closest Brownfields record about 2.6 miles outFederal environmental registers
- Schoolcraft County's boundary and the 750,000 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 5b and a ~161-day seasonGrowable Ground crop-matching engine
- Schoolcraft County sitting wholly inside the Northern Lakes and ForestsUS EPA Level III Ecoregions
- Open occurrence records documented in Schoolcraft County for a tracked speciesGBIF derived datasets (CC0 / CC BY 4.0)
- Which agricultural compounds go onto Schoolcraft 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 Schoolcraft County — the ~161 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 Schoolcraft County's 750,000 acreswhy one lot differs from the next →
- Which of those 121 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 Schoolcraft Countyread your own land →