Jackson, Michigan, sits in USDA hardiness zone 6a — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
Growers here do well with cabbage, hazelnut, lavender, and collard greens — with the usual caveat that any single yard's soil, sun, and drainage cast the deciding vote.
Even in Jackson, 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 Jackson 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 Jackson — soil, climate, flood, and parcel records. How we handle your address.
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Jackson — the short answer
Jackson, Michigan: USDA zone 6a, about 187 days between hard freezes, across 7K acres of city.
- USDA zone
- 6a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 20
- 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
- ~187
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 7K 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 Jackson's average, not your lot's — a low corner or a tree line moves it. Against Jackson's 187-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Jackson
Each reading below is measured for Jackson itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredJackson runs about 187 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
MeasuredJackson 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 Jackson is in
Jackson sits in the Southern Michigan/Northern Indiana Drift Plains — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Jackson's own centroid rather than borrowed from Jackson County.
What Grows in Jackson
Every plant below cleared Jackson's own zone 6a and its 187-day season. Each card opens that plant's Michigan profile. How we score.
Is it too late to plant in Jackson?
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 23; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 20 (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. The tail of the season still works: sixty-day crops into late summer, quick greens after, garlic last of all.
Documented around Jackson
Survey cells within 31 miles of Jackson 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 Jackson
Closest first, within ~10 miles of Jackson. Listing isn't leaking, and distance isn't exposure.
- QUALITY AUTO CAREBrownfields · 550 ft
- Louis 24 Hour Service IncUnderground Storage Tanks · 900 ft
- Jackson Police DeptUnderground Storage Tanks · 1000 ft
- Schafer Dry Cleaning CoUnderground Storage Tanks · 1000 ft
- BookstoreUnderground Storage Tanks · 1200 ft
- Francis Street Shell IncUnderground Storage Tanks · 1200 ft
- CONSUMERS ENERGY COBrownfields · 1200 ft
- Jackson County CourthouseUnderground Storage Tanks · 1200 ft
- MICHIGAN BELL TELEPHONE COMPANYBrownfields · 1300 ft
- Jackson CO (M49145)Underground Storage Tanks · 1300 ft
- CMS ENERGY GAS TRANSMISSION AND STORAGEBrownfields · 1300 ft
- Marathon Unit #2532Underground Storage Tanks · 1300 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Jackson'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 Jackson.
Sources Checked
within ~10 miles of Jackson
Severity Distribution
within ~10 miles of Jackson
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Jackson, Superfund runs higher than the national average — 11 sites within ~10 miles of Jackson. Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
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 Jackson
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 Jackson average
Your land is one point inside Jackson
Everything above resolves to Jackson as a whole — one PHZM band and one 28°F frost record, read across 7K 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 Jackson Average
Jackson Average
- ●USDA Zones 6a, averaged across Jackson
- ●One soil character for all of Jackson
- ●Frost dates read at Jackson's scale: Apr 20 to Oct 24
YOUR Parcel
- ✓Your exact zone, not Jackson's 6a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Jackson
Pull a site-specific report for your exact address in Jackson, Michigan — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Jackson averages can't show:
We read public map data around Jackson — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Jackson average
How we know this about Jackson
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 Jackson’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 Jackson
When does frost risk typically end in Jackson?
The last hard freeze (28°F) in Jackson typically lands around Apr 20, 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 11.
When is the first frost in Jackson?
The first hard freeze (28°F) in Jackson 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 187 days after the spring freeze cleared.
How long is the growing season in Jackson?
Measured between 28°F hard freezes, Jackson sees about 187 frost-free days — roughly Apr 20 through Oct 24, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 11 to Oct 10, about 152 days.
Is the soil safe to grow vegetables in Jackson?
The federal record around Jackson is a meaningful one — 817 documented sites, mostly Underground Storage Tanks entries (423), the nearest Brownfields record about 0.1 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.
How do I protect my plants from frost in Jackson?
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 Jackson's scale — its 6a band and its 187-day season. Your yard writes its own version of Jackson'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 Jackson’s own scale
7 of the readings below were taken at Jackson's own scale — its own ~187-day season between 28°F freezes, the 6,894 acres it covers and 817 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Jackson's own USDA hardiness band, zones 6aUSDA PHZM 2023
- Jackson's own 28°F hard-freeze dates, about Apr 20 and Oct 24 and the ~187-day span between themNOAA 1991–2020 Climate Normals
- 817 documented contamination sites on the federal record near Jackson, the closest Brownfields record about 0.1 miles out from the town centreFederal environmental registers
- Jackson's boundary and the 6,894 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6a and a ~187-day seasonGrowable Ground crop-matching engine
- The ecoregion at Jackson's own centroid, the Southern Michigan/Northern Indiana Drift PlainsUS EPA Level III Ecoregions
- Lanternfly survey cells around Jackson 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 Jackson's 6,894 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 Jackson's 6,894 acreswhy one lot differs from the next →
- Which side of Jackson you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 6,894 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields 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 Jackson-wide figureread your own land →
More in Michigan
Wider growing context
What grows across MichiganJackson sits outside our named growing regions, so Michigan as a whole is its closest context here.
Nearby growing guides