Spring Arbor, Michigan, sits in USDA hardiness zone 6a — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
The conditions favor cabbage, hazelnut, lavender, and collard greens, among others — though every individual site edits that list with its own soil, sun, and drainage.
Even in Spring Arbor, 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 Spring Arbor 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 Spring Arbor — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Spring Arbor — the short answer
Spring Arbor, Michigan: USDA zone 6a, about 189 days between hard freezes, across 2K acres of town.
- USDA zone
- 6a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 21
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 27
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~189
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 2K 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 Spring Arbor's average, not your lot's — a low corner or a tree line moves it. Against Spring Arbor's 189-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Spring Arbor
Each reading below is measured for Spring Arbor itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredSpring Arbor runs about 189 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
MeasuredSpring Arbor 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 Spring Arbor is in
Spring Arbor sits in the Southern Michigan/Northern Indiana Drift Plains — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Spring Arbor's own centroid rather than borrowed from Jackson County.
What Grows in Spring Arbor
Every plant below cleared Spring Arbor's own zone 6a and its 189-day season. Each card opens that plant's Michigan profile. How we score.
Is it too late to plant in Spring Arbor?
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 24; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 21 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 27 — long-season crops need about 90 days of runway, quick greens only 30. The tail of the season still works: sixty-day crops into late summer, quick greens after, garlic last of all.
Documented around Spring Arbor
Survey cells within 31 miles of Spring Arbor checked for spotted lanternfly, none carrying a detection — a surveyed negative, not an absence of looking. Nearest documented record 58 miles off. What to watch for.
What's on the federal record near Spring Arbor
Closest first, within ~10 miles of Spring Arbor. Listing isn't leaking, and distance isn't exposure.
- Spring Arbor CollegeUnderground Storage Tanks · 600 ft
- SPRING ARBOR UNIVERSITYBrownfields · 650 ft
- Spring Arobr Twp Fire DeptUnderground Storage Tanks · 700 ft
- SPRING ARBOR COATINGS (PROGRESSIVE COATINGS)Brownfields · 1100 ft
- BOYER MACHINE INCBrownfields · 1100 ft
- Spring Arbor PsUnderground Storage Tanks · 1100 ft
- NoneUnderground Storage Tanks · 1300 ft
- AUTO MASTERBrownfields · 1400 ft
- FABRICATION CONCEPTSBrownfields · 2600 ft
- AEROQUIP CORPORATIONToxics Release Inventory · 0.6 mi
- Spring Arbor MarathonUnderground Storage Tanks · 0.6 mi
- Spring Arbor Ps Mart #1003-aUnderground Storage Tanks · 0.7 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Spring Arbor'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 Spring Arbor.
Sources Checked
within ~10 miles of Spring Arbor
Severity Distribution
within ~10 miles of Spring Arbor
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Spring Arbor, Superfund runs higher than the national average — 15 sites within ~10 miles of Spring Arbor. 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.
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Check your specific parcel in Spring Arbor
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 Spring Arbor average
Your land is one point inside Spring Arbor
Everything above resolves to Spring Arbor as a whole — one PHZM band and one 28°F frost record, read across 2K 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 Spring Arbor Average
Spring Arbor Average
- ●USDA Zones 6a, averaged across Spring Arbor
- ●One soil character for all of Spring Arbor
- ●Frost dates read at Spring Arbor's scale: Apr 21 to Oct 27
YOUR Parcel
- ✓Your exact zone, not Spring Arbor's 6a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Spring Arbor
Pull a site-specific report for your exact address in Spring Arbor, Michigan — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Spring Arbor averages can't show:
We read public map data around Spring Arbor — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Spring Arbor average
How we know this about Spring Arbor
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 Spring Arbor’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 Spring Arbor
When does frost risk typically end in Spring Arbor?
The last hard freeze (28°F) in Spring Arbor typically lands around Apr 21, 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 12.
When is the first frost in Spring Arbor?
The first hard freeze (28°F) in Spring Arbor typically arrives around Oct 27, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 13, so the watching starts about Sep 27 — about 189 days after the spring freeze cleared.
How long is the growing season in Spring Arbor?
Measured between 28°F hard freezes, Spring Arbor sees about 189 frost-free days — roughly Apr 21 through Oct 27, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 12 to Oct 13, about 154 days.
Is the soil safe to grow vegetables in Spring Arbor?
The federal record around Spring Arbor runs heavier than most — 723 documented sites, mostly Underground Storage Tanks entries (373), the nearest Underground Storage Tanks record about 0.1 miles 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.
How do I protect my plants from frost in Spring Arbor?
From about Sep 27 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 27 (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 27. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Spring Arbor's scale — its 6a band and its 189-day season. Your yard writes its own version of Spring Arbor'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 Spring Arbor’s own scale
7 of the readings below were taken at Spring Arbor's own scale — its own ~189-day season between 28°F freezes, the 1,777 acres it covers and 723 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Spring Arbor's own USDA hardiness band, zones 6aUSDA PHZM 2023
- Spring Arbor's own 28°F hard-freeze dates, about Apr 21 and Oct 27 and the ~189-day span between themNOAA 1991–2020 Climate Normals
- 723 documented contamination sites on the federal record near Spring Arbor, the closest Underground Storage Tanks record about 0.1 miles out from the town centreFederal environmental registers
- Spring Arbor's boundary and the 1,777 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6a and a ~189-day seasonGrowable Ground crop-matching engine
- The ecoregion at Spring Arbor's own centroid, the Southern Michigan/Northern Indiana Drift PlainsUS EPA Level III Ecoregions
- Lanternfly survey cells around Spring Arbor 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 Spring Arbor's 1,777 acres read through its county's SSURGO summaryfrom Jackson County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Jackson 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 Jackson County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Spring Arbor's 1,777 acreswhy one lot differs from the next →
- Which side of Spring Arbor you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 1,777 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.1 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 Spring Arbor-wide figureread your own land →
More in Michigan
Wider growing context
What grows across MichiganSpring Arbor sits outside our named growing regions, so Michigan as a whole is its closest context here.
Nearby growing guides