The North Shore (Lake Superior) spans USDA hardiness zones 4a-4b — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
Superior's deep water squeezes a 4a-4b shoreline band out of Duluth-to-Grand-Marais country whose interior reads 3b — later falls, safer springs, and the moderated edge that makes North Shore orchards and gardens possible. Expect tomato, honeycrisp apple, red pine, and wild rice to be strong candidates here; the deciding factors on any one parcel stay local — soil, sun, and drainage.
The North Shore (Lake Superior) spans Minnesota.
Your yard isn't all of the North Shore (Lake Superior).
The North Shore (Lake Superior) spans USDA zones 4a-4b, but your parcel sits in exactly one — and slope, tree cover, and low spots nudge it further. 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 North Shore (Lake Superior) — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
The North Shore (Lake Superior) — the short answer
The North Shore (Lake Superior): USDA zones 4a-4b, 150–181 frost-free days depending where in it you stand, in Minnesota.
- USDA zones
- 4a-4b
- USDA PHZM 2023, aggregated over the footprint
- Shortest season here
- 150 days
- NOAA Regional Climate Centers ACIS, 1991-2020 — Lutsen
- Towns
- 7
- US Census TIGER/Line 2025
- Region type
- Town cluster
- Growable Ground growing-region registry
Region boundary: Growable Ground growing-region registry — curated county clusters, EPA Level III ecoregions, and town clusters drawn finer than any county. The season figure is this region's own record, measured across its 7 member towns, not a state or national average.
Hardiness Zone Range
The North Shore (Lake Superior) is not one growing season
One answer for the North Shore (Lake Superior) averages 7 towns whose growing seasons are 31 days apart — from 150 frost-free days in Lutsen to 181 in Grand Marais. That is the same region, measured the same way, in the same years. Which end of it your land sits nearer decides what finishes before the first hard freeze.
The middle half of 7 towns runs 164–175 days, with a median of 174 days — a 31-day span end to end.
Measured across 7 member towns, each carrying its own 28°F normal. NOAA Regional Climate Centers ACIS, 1991-2020. A member with no own record is absent from the range rather than counted as zero — nothing here is interpolated to the region. Your own site sits somewhere inside this range; a parcel report resolves where.
Where the line runs inside the North Shore (Lake Superior)
The middle half of the North Shore (Lake Superior) runs 164–175 frost-free days, and 3 of its 7 towns sit outside that — 2 on the short side, 1 on the long. A regional planting date describes the middle well and the ends poorly, which is worth knowing before you follow one.
Under 164 frost-free days
2 towns
- Lutsen · 150 days
- Silver Bay · 156 days
The end of the region that sets the planting calendar — start seed indoors here and the season stretches to meet the crop.
164–175 frost-free days
4 towns
0 of 4 shown
The middle half of the region, and the part a single regional season describes well.
Over 175 frost-free days
1 town
- Grand Marais · 181 days
Long enough for a second succession of a quick crop after the first comes out.
Each town is placed by its OWN 28°F frost-free normal (NOAA Regional Climate Centers ACIS, 1991-2020), the same figure its own guide page publishes. Elevation, slope and cold-air drainage move a site within its town as well — which is the part only your address resolves.
What Grows in the North Shore (Lake Superior)
All 1 of the plants below that publish a season requirement clear even Lutsen’s 150 frost-free days — so on season alone, this grid works at both ends of the region. The 31-day spread still decides how far past this list you can push, and how early you can start.
Plants matched to the North Shore (Lake Superior)'s USDA zones 4a-4b, ordered by how much hardiness margin each has across the region — the ones with room to spare at both ends of this band lead. Each links to its full growing profile.
Native Plants of the North Shore (Lake Superior)
Plants the USDA PLANTS Database documents as native and present in this region’s state, kept only where the published hardiness range meets the North Shore (Lake Superior)’s USDA zones 4a-4b — closest range match first. Presence is recorded by state, so a plant can be documented across the state and still be scarce in your corner of the region.
The ground around the North Shore (Lake Superior)
The USDA soil survey maps this ground county by county. These are those records weighted by land area across the three counties containing the North Shore (Lake Superior) — the ground the North Shore (Lake Superior) sits in, read at the only grain the survey publishes.
In the counties containing the North Shore (Lake Superior), the ground is predominantly Inceptisols, at 50% of mapped acres, followed by Histosols (26%), Alfisols (16%) and Entisols (7%). Five soil orders appear in that record, which is the honest reason a regional soil answer only goes so far. The most extensive named soils are Greenwood, Eveleth, and Rifle.
30% of those acres are well drained, and another 28% very poorly drained, 13% moderately well drained. Topsoil pH runs 4.9–5.6 between the lowest and the highest county on record. 2% of the footprint is classed prime farmland.
Soil order
Inceptisols
Drainage
Well drained
Topsoil pH
4.9–5.6
Hydric soils
46%
Soil changes across a driveway, so which of these your own ground sits on is a parcel question rather than a regional one. St. Louis County holds the most wetland ground here, at 51% — soil types explained.
USDA NRCS SSURGO via Soil Data Access
What this means for growing in the North Shore (Lake Superior)
The soil survey reads this ground county by county, and the readings above are the record for the counties containing the North Shore (Lake Superior). Here is what they mean for a garden here — and the move an experienced grower makes about each one.
Drainage
From county records30% of the mapped acres across the counties containing the North Shore (Lake Superior) are well drained — ground that drains quickly. The survey maps this ground county-wide, so it describes the setting the North Shore (Lake Superior) sits in rather than the valley floor alone.
The upside is soil you can work early in spring and roots that never drown; the cost is that fast-draining ground dries out fast and leaches nutrients away before plants can use them.
Work in compost and mulch to hold moisture and feed, and water more often in short doses than deep and rarely.
USDA NRCS SSURGO
Surface pH
From county recordsTopsoil across the counties containing the North Shore (Lake Superior) runs pH 4.9–5.6 — acidic in all three of them.
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
Wet ground
From county recordsAbout 46% of the ground across the counties containing the North Shore (Lake Superior) is mapped as hydric — wetland — soil. St. Louis County carries the most, at 51%.
If your lot falls in one of those pockets, a standard in-ground bed will fight waterlogging all season, and roots that need air will struggle.
Check how your own ground drains before you dig; raised beds or moisture-loving plantings turn a wet corner from a problem into a niche.
USDA NRCS SSURGO
Safe to Grow Here?
What the federal record shows across the North Shore (Lake Superior) — and how to grow with it.
Across the 3 counties containing the North Shore (Lake Superior) the federal record holds 2,683 documented sites, mostly Brownfields (1,254), Underground Storage Tanks (1,062) and Nitrate (238). The heaviest single county is St. Louis County, with 2,331.
That is the containing counties' count — this region is a smaller piece of that ground, so it is context, not a reading of any one lot. Open the map outlined to the North Shore (Lake Superior) to see which records sit where you actually grow.
Sources Checked
Summed across the 3 counties containing the North Shore (Lake Superior)
Know Before You Grow
- •Near a brownfield, raised beds of imported soil give your food clean ground.
- •Underground tanks leak petroleum as they age — near a former filling station, test the soil.
- •On a private well, test for nitrates: above 10 mg/L the water needs treatment before irrigating.
Sources: EPA, USGS — 1.8M documented sites tracked nationwide across 9 federal source types.
Your land is one point inside the North Shore (Lake Superior)
Everything above resolves to the North Shore (Lake Superior) as a whole — a footprint whose own towns record seasons 31 days apart, and hardiness across zones 4a-4b. Your parcel sits at one point in that range, not in the middle of it. 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 region 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 regional average.
Your Lot vs the North Shore (Lake Superior) Average
North Shore (Lake Superior) Average
- ●USDA Zones 4a-4b, averaged across North Shore (Lake Superior)
- ●One soil character for all of North Shore (Lake Superior)
- ●State-average frost dates
YOUR Parcel
- ✓Your exact zone, not North Shore (Lake Superior)'s 4a-4b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your parcel in the North Shore (Lake Superior)
Pull a site-specific report for your exact address in the North Shore (Lake Superior) — soil, sun, drainage, frost risk, contamination, and scored plant recommendations.
Three things about your lot that North Shore (Lake Superior) averages can't show:
We read public map data around The North Shore (Lake Superior) — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the North Shore (Lake Superior) average
How we know this about the North Shore (Lake Superior)
The boundary: the region's own towns — a footprint finer than any county, because the county average would misread this microclimate. Growing regions have no official boundary, so this footprint is our published one, and every figure on this page was measured over the towns inside it rather than borrowed from the state around it.
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, aggregated across the footprint; the growing season from NOAA Regional Climate Centers ACIS 1991–2020 28°F normals, read at each member’s own record; boundaries from US Census TIGER/Line 2025; the contamination record from the federal sources named in that beat above; the soil from the USDA NRCS SSURGO survey, read at each member county’s own record and weighted to this footprint by land area. Where a member carries no record of its own, it is absent from the figure rather than filled in.
Common questions about the North Shore (Lake Superior)
What hardiness zone is the North Shore (Lake Superior)?
The North Shore (Lake Superior) spans USDA hardiness zones 4a-4b, aggregated from the USDA Agricultural Research Service Plant Hardiness Zone Map 2023 across the region's own towns. Zones reflect average annual extreme minimum temperatures from 1991–2020 data.
How long is the growing season in the North Shore (Lake Superior)?
Measured between 28°F hard freezes, the North Shore (Lake Superior)'s towns mostly run 164 to 175 frost-free days, median 174 (NOAA Regional Climate Centers ACIS, 1991–2020, over 7 member towns). That 11-day spread is the honest read — no single season describes 7 towns, and each town guide below carries its own.
When does frost risk end in the North Shore (Lake Superior)?
Across the North Shore (Lake Superior), the middle half of member towns see their last 28°F hard freeze between Apr 30 and May 5 (median May 1), and their first fall freeze between Oct 14 and Oct 23. Those are hard freezes, not the last light frost: tender transplants wait for about May 22, and elevation decides which end of a 5-day spread you garden in.
What grows well in the North Shore (Lake Superior)?
The North Shore (Lake Superior)'s conditions suit plants such as Tomato, Honeycrisp Apple, Red Pine, Wild Rice. What actually thrives on any one site still turns on its specific soil, sun, and drainage — we score each plant against the real conditions at your address.
How is the North Shore (Lake Superior) defined?
The North Shore (Lake Superior) is a true microclimate — smaller than the counties that contain it, with a growing reality of its own. So this page is built from the region's own 7 towns, each carrying its own hardiness zone and frost record, rather than from a county average measured somewhere else.
Which states does the North Shore (Lake Superior) cover?
The North Shore (Lake Superior) spans Minnesota. Each state's full growing guide is linked on this page.
What other growing regions cover the same states?
Driftless Area, Red River Valley, and Twin Cities Metro share at least one state with the North Shore (Lake Superior). Growing regions overlap and interlock — a single address can sit inside more than one, which is why the precise read is always the parcel, not the region.
What this page reads at the North Shore (Lake Superior)’s own scale
6 of the readings below were taken at the North Shore (Lake Superior)'s own scale — the zone 4a-4b band across its footprint, a median 174-day season across its 7 towns and 2,683 documented federal contamination records across its 3 counties, 2,331 of them in St. Louis County alone; one is borrowed from a wider read, named and linked below.
Measured here
- The USDA hardiness band 4a-4b aggregated across all 7 towns in the footprintUSDA PHZM 2023
- The boundary itself — the 7 towns this region is curated fromGrowable Ground subregion registry
- The growing character that makes this region distinct from the states it crossesGrowable Ground subregion registry
- The 28°F season across the footprint — the middle half of its 7 towns run 164 to 175 frost-free days, median 174NOAA Regional Climate Centers ACIS, 1991-2020
- The federal contamination record over the whole footprint — 2,683 documented federal contamination records across its 3 counties, 2,331 of them in St. Louis County aloneEPA, USGS and USDA federal site records
- The soil order mix across the footprint — 50% Inceptisols, topsoil pH 4.9–5.6, area-weighted across its 3 mapped countiesUSDA NRCS SSURGO
Inherited from a wider read
- The candidate plant list — its state's curated sets, merged and filtered to zones 4a-4bfrom Minnesota
What this page can’t tell you
- Which end of the 11-day range your ground sits at — 164 days at one extreme, 175 at the other, decided mostly by elevationfrost dates explained →
- Which of those soils your own ground sits on — the survey maps them county-wide, and they change across a drivewaysoil types explained →
- The soil pH, drainage, sun hours, and frost pockets on one specific lotwhy one lot differs from the next →
Explore the North Shore (Lake Superior)
State growing guides
Towns in this region
Counties containing this region
Other growing regions across Minnesota
An unglaciated landscape of steep ridges, deep valleys, and spring-fed coulees in the Upper Midwest — a stronghold of diversified small farms and cold-hardy fruit.
The flat floor of glacial Lake Agassiz along the Red River of the North — deep, dark lakebed clays and one of the coldest, shortest northern seasons on the platform (USDA zones 3b-4b) behind classic sugar-beet, potato, and spring-wheat country.
One metro, two frost calendars. The Minneapolis-St. Paul urban core sits in zone 5a while its outer suburbs and exurbs — Anoka, Carver, and Scott — drop to 4b, a real half-zone spread that stretches the frost-free season by more than two weeks across the seven counties (roughly 181 days in the exurbs to 199 in the city). Which side of that line your parcel falls on matters more here than any statewide answer.