Rochester Hills, Michigan, sits in USDA hardiness zone 6a — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
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 Rochester Hills, 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 Rochester Hills 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 Rochester Hills — soil, climate, flood, and parcel records. How we handle your address.
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Rochester Hills — the short answer
Rochester Hills, Michigan: USDA zone 6a, about 205 days between hard freezes, across 21K acres of city.
- USDA zone
- 6a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 13
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 4
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~205
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 21K 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 Rochester Hills's average, not your lot's — a low corner or a tree line moves it. Against Rochester Hills's 205-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Rochester Hills
Each reading below is measured for Rochester Hills itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredRochester Hills runs about 205 days between hard freezes — a long growing season.
There is slack for succession plantings and slow-finishing crops: many vegetables can be sown twice, and the heat-lovers have time to ripen fully.
Plan a second sowing of quick crops after the first comes out, and use the fall window most gardeners let sit idle.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredRochester Hills 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 Rochester Hills is in
Rochester Hills sits in the Southern Michigan/Northern Indiana Drift Plains — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Rochester Hills's own centroid rather than borrowed from Oakland County.
What Grows in Rochester Hills
Every plant below cleared Rochester Hills's own zone 6a and its 205-day season. Each card opens that plant's Michigan profile. How we score.
Is it too late to plant in Rochester Hills?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Mar 16; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 13 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 4 — long-season crops need about 90 days of runway, quick greens only 30. There is slack in a calendar like this — late plantings, second rounds of favorites, and a fall bench that keeps beds working.
Documented around Rochester Hills
Spotted lanternfly documented 8 miles from Rochester Hills, first recorded 2022. What to watch for.
What's on the federal record near Rochester Hills
Closest first, within ~10 miles of Rochester Hills. Listing isn't leaking, and distance isn't exposure.
- SPEEDWAY LLCBrownfields · 650 ft
- EEI GLOBAL INCBrownfields · 1900 ft
- EATON CORPORATIONToxics Release Inventory · 1900 ft
- Rochester Hills Fire DepartmentUnderground Storage Tanks · 2200 ft
- MODELS & TOOLS INCBrownfields · 2500 ft
- BellBrook MercyUnderground Storage Tanks · 2500 ft
- DYNASTY MOLD & ENGINEERINGBrownfields · 2600 ft
- AIR AND LIQUID SYSTEMS INCBrownfields · 0.5 mi
- T A SYSTEMS INCBrownfields · 0.6 mi
- HYDRO-CRAFT INCBrownfields · 0.6 mi
- SUDAN CORPORATIONBrownfields · 0.6 mi
- ROCHESTER HILLS COLLISION INCBrownfields · 0.6 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Rochester Hills'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 Rochester Hills.
Sources Checked
within ~10 miles of Rochester Hills
Severity Distribution
within ~10 miles of Rochester Hills
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Rochester Hills, Brownfields runs higher than the national average — 1,745 sites within ~10 miles of Rochester Hills. Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
Brownfields: Brownfield sites are former commercial or industrial properties where legacy soil contamination (heavy metals, PAHs, petroleum compounds) may persist.
Check EPA brownfield remediation status — many sites have completed cleanup with institutional controls.
Check your specific parcel in Rochester Hills
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 Rochester Hills average
Your land is one point inside Rochester Hills
Everything above resolves to Rochester Hills as a whole — one PHZM band and one 28°F frost record, read across 21K 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 Rochester Hills Average
Rochester Hills Average
- ●USDA Zones 6a, averaged across Rochester Hills
- ●One soil character for all of Rochester Hills
- ●Frost dates read at Rochester Hills's scale: Apr 13 to Nov 4
YOUR Parcel
- ✓Your exact zone, not Rochester Hills's 6a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Rochester Hills
Pull a site-specific report for your exact address in Rochester Hills, Michigan — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Rochester Hills averages can't show:
We read public map data around Rochester Hills — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Rochester Hills average
How we know this about Rochester Hills
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 Rochester Hills’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 Rochester Hills
When does frost risk typically end in Rochester Hills?
The last hard freeze (28°F) in Rochester Hills typically lands around Apr 13, 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 4.
When is the first frost in Rochester Hills?
The first hard freeze (28°F) in Rochester Hills typically arrives around Nov 4, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 21, so the watching starts about Oct 5 — about 205 days after the spring freeze cleared.
How long is the growing season in Rochester Hills?
Measured between 28°F hard freezes, Rochester Hills sees about 205 frost-free days — roughly Apr 13 through Nov 4, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 4 to Oct 21, about 170 days.
Is the soil safe to grow vegetables in Rochester Hills?
The federal record around Rochester Hills runs heavier than most — 3,125 documented sites, mostly Brownfields entries (1,745), the nearest Brownfields 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 Rochester Hills?
From about Oct 5 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 Nov 4 (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 Nov 4. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Rochester Hills's scale — its 6a band and its 205-day season. Your yard writes its own version of Rochester Hills'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 Rochester Hills’s own scale
7 of the readings below were taken at Rochester Hills's own scale — its own ~205-day season between 28°F freezes, the 20,995 acres it covers and 3,125 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Rochester Hills's own USDA hardiness band, zones 6aUSDA PHZM 2023
- Rochester Hills's own 28°F hard-freeze dates, about Apr 13 and Nov 4 and the ~205-day span between themNOAA 1991–2020 Climate Normals
- 3,125 documented contamination sites on the federal record near Rochester Hills, the closest Brownfields record about 0.1 miles out from the town centreFederal environmental registers
- Rochester Hills's boundary and the 20,995 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6a and a ~205-day seasonGrowable Ground crop-matching engine
- The ecoregion at Rochester Hills's own centroid, the Southern Michigan/Northern Indiana Drift PlainsUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Rochester Hillslydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Rochester Hills's 20,995 acres read through its county's SSURGO summaryfrom Oakland County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Oakland 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 Oakland County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Rochester Hills's 20,995 acreswhy one lot differs from the next →
- Which side of Rochester Hills you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 20,995 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 Rochester Hills-wide figureread your own land →