St. Clair Shores, Michigan, sits in USDA hardiness zones 5a-6b — a zone band wide enough that plant choice, not possibility, is the interesting question.
Expect cherry, blueberry, apple, and asparagus to be strong candidates here; the deciding factors on any one parcel stay local — soil, sun, and drainage.
Even in St. Clair Shores, 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 St. Clair Shores lot. Enter your address and we'll score 1,112 plants against your land's actual soil, sun, and frost.
We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.
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Quick Facts
USDA Zones
5a-6b
Last Hard Freeze (28°F)
Mar 30
Town normal — light frosts run a few weeks later
First Hard Freeze (28°F)
Nov 25
Town normal — light frosts arrive a few weeks earlier
City Area
7K acres
Hardiness Zone Range
Zone maps are averages across St. Clair Shores. Your yard's slope, trees, and frost pockets shift what actually grows — see your land's exact reading.
Soil varies lot by lot — soil types explained.
What Grows in St. Clair Shores
Plants matched to St. Clair Shores's USDA zones 5a-6b — each links to its full growing profile.
Is it too late to plant in St. Clair Shores?
Rarely: the season closes in stages, not all at once, and each stage has its crops. Cool-season crops can go in from around Mar 2; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 30 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 25 — long-season crops need about 90 days of runway, quick greens only 30. With a season this long, “too late” mostly means “switch crops” — second sowings and a full fall garden are the norm, with garlic closing the year.
Growing Challenges in Michigan
What an experienced grower plans around here — each one has a move.
Lake effect weather creates highly localized microclimates
Lake effect rewrites the map mile by mile — check your exact site, not your region, before you commit a planting plan.
Short northern season (100-120 frost-free days in UP)
Up north, fast-maturing varieties plus a hoop house or cold frame turn a tight season into a dependable one.
Sandy soils in western MI drain too quickly
Compost and cover crops, applied annually, teach sandy ground to hold water — the west-side fix is organic matter.
For cultivar selection, pest pressure, and planting-time guidance specific to Michigan, the MSU Extension is the authoritative local source.
Environmental Intelligence
Understanding what's nearby helps you make informed decisions about where and how to grow.
Total Sites
3,256
within ~10 miles of St. Clair Shores
Risk Level
High
Highest-severity
47 Superfund sites
Sources Checked
within ~10 miles of St. Clair Shores
Severity Distribution
within ~10 miles of St. Clair Shores
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around St. Clair Shores, two things run higher than the national average — Superfund (47 sites) and Brownfields (1,610 sites). 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.
Brownfields: Brownfield sites are former commercial or industrial properties where legacy soil contamination (heavy metals, PAHs, petroleum compounds) may persist.
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Check EPA brownfield remediation status — many sites have completed cleanup with institutional controls.
Check your specific parcel in St. Clair Shores
Get exact proximity distances to contamination sources for your specific parcel — plus soil, sun, drainage, and 1,112 plant recommendations.
Three things about your exact spot that zone averages miss:
We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources analyzed in seconds
Your Specific Parcel Matters
St. Clair Shores Average
- ●USDA Zones 5a-6b
- ●Generic soil type for the area
- ●State-average frost dates
YOUR Parcel
- ✓Your exact hardiness zone
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in St. Clair Shores
Pull a site-specific report for your exact address in St. Clair Shores, Michigan — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your exact spot that zone averages miss:
We read public map data for this spot — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources analyzed in seconds
Key Growing Facts for St. Clair Shores, Michigan
- USDA Hardiness Zones: 5a-6b (USDA PHZM 2023)
- Last Hard Freeze (28°F): Mar 30 (town normal, NOAA 1991–2020 Climate Normals — light frosts can follow for a few weeks)
- First Hard Freeze (28°F): Nov 25 (town normal, NOAA 1991–2020 Climate Normals — light frosts can arrive a few weeks earlier)
- Days Between Hard Freezes: ~240 (town normal, NOAA 1991–2020 Climate Normals)
- Land Area: 7K acres (US Census TIGER 2025)
Zone data: USDA ARS Plant Hardiness Zone Map 2023. Climate data: NOAA NCEI. Boundaries: US Census TIGER/Line 2025.
Frequently Asked Questions
What hardiness zone is St. Clair Shores, Michigan?
St. Clair Shores sits in USDA hardiness zones 5a-6b, per the USDA Plant Hardiness Zone Map 2023. Zones reflect average annual extreme minimum temperatures from 1991–2020 weather data.
Is it too late to plant in St. Clair Shores?
Rarely: the season closes in stages, not all at once, and each stage has its crops. Cool-season crops can go in from around Mar 2; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Mar 30 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 25 — long-season crops need about 90 days of runway, quick greens only 30. With a season this long, “too late” mostly means “switch crops” — second sowings and a full fall garden are the norm, with garlic closing the year.
When does frost risk typically end in St. Clair Shores?
The last hard freeze (28°F) in St. Clair Shores typically lands around Mar 30, per NOAA 1991–2020 climate normals — an earlier marker than the light-frost dates many planting charts quote. That marks the hard freeze, not the last light frost — light frosts can still bite for a few more weeks, so tender transplants usually wait another 2–3 weeks.
When is the first frost in St. Clair Shores?
The first hard freeze (28°F) in St. Clair Shores typically arrives around Nov 25, per NOAA 1991–2020 climate normals — the point most tender summer crops finish. Lighter frosts usually reach a couple of weeks earlier, so watch the forecast from late summer on and harvest or cover tender plants before the first cold night.
What vegetables grow in St. Clair Shores?
St. Clair Shores's zones 5a-6b support a wide range — strong performers include Cherry, Blueberry, Apple, Asparagus, and White Pine. What actually takes on any one site comes down to its soil, sun, and drainage, and we score each plant against the real conditions at your address.
Which hardiness zone is St. Clair Shores, really?
Officially, St. Clair Shores sits in USDA zones 5a-6b (USDA PHZM 2023) — but a zone is a 30-year average of winter's coldest night across an area, and it can't see any one yard. A south-facing slope, a tree line, or a low frost pocket can shift a single site by half a zone either way, which is why neighboring gardeners often quote different numbers. We read the conditions at your exact address — soil, sun, slope, and frost — and score 1,112 plants against what's actually there.
Is the soil safe to grow vegetables in St. Clair Shores?
The federal record around St. Clair Shores runs heavier than most — 3,256 documented sites — 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 St. Clair Shores?
As the season closes around the first 28°F hard freeze near Nov 25 (NOAA 1991–2020 climate normals), a few moves buy time: cover tender plants with floating row cover or an old sheet on still, clear nights, water the soil the afternoon before a freeze so it holds warmth overnight, and harvest frost-tender crops like tomatoes, peppers, and basil before the first hard night. Hardy greens and root crops shrug off light frost and often sweeten after it, so leave them in.
Everything on this page is a St. Clair Shores average. Your yard writes its own version — we read soil, sun, drainage, and frost at your exact address. Try it for 14 days — no card required.