Two Harbors, Minnesota, sits in USDA hardiness zone 4b — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
Among the crops suited to this profile: cabbage, cranberry, turkish rocket, and collard greens. The site-level story — soil, sun, drainage — decides the rest.
Even in Two Harbors, 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 Two Harbors 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 Two Harbors — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Two Harbors — the short answer
Two Harbors, Minnesota: USDA zone 4b, about 175 days between hard freezes, across 2K acres of city.
- USDA zone
- 4b
- USDA PHZM 2023
- Last hard freeze (28°F)
- May 1
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 23
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~175
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City 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 4b is Two Harbors's average, not your lot's — a low corner or a tree line moves it. Against Two Harbors's 175-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Two Harbors
Each reading below is measured for Two Harbors itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredTwo Harbors runs about 175 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
MeasuredTwo Harbors sits in USDA hardiness zone 4b.
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 Two Harbors is in
Two Harbors sits in the Northern Lakes and Forests — EPA Level III, inside the wider Northern Forests. That is read at Two Harbors's own centroid rather than borrowed from Lake County.
What Grows in Two Harbors
Every plant below cleared Two Harbors's own zone 4b and its 175-day season. Each card opens that plant's Minnesota profile. How we score.
Is it too late to plant in Two Harbors?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Apr 3; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near May 1 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 23 — 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.
What's on the federal record near Two Harbors
Closest first, within ~10 miles of Two Harbors. Listing isn't leaking, and distance isn't exposure.
- SONJU SUPER STORE LLCBrownfields · 700 ft
- M.C. HOWARD BUILDERS CORPBrownfields · 1300 ft
- SCHEMMER'S CLEANING SERVICESBrownfields · 1400 ft
- ESSENTIA HEALTH TWO HARBORS PHARMACYBrownfields · 1400 ft
- Minit Mart #583Underground Storage Tanks · 1500 ft
- PAMIDA 21Brownfields · 1600 ft
- GOODWILL #16Brownfields · 1700 ft
- Two Harbors MilkhouseUnderground Storage Tanks · 2000 ft
- SCENIC SHORES ASSISTED LIVINGBrownfields · 2100 ft
- POLARIS PHARMACY (LTCF-HHW) WATERVIEW SHORESBrownfields · 2100 ft
- SCENIC SHORES CARE CENTERBrownfields · 2100 ft
- Castle Danger StoreUnderground Storage Tanks · 2200 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Two Harbors'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 Two Harbors.
Total Sites
108
within ~10 miles of Two Harbors
Risk Level
Elevated
Highest-severity
1 Superfund site (none NPL-listed)
Sources Checked
within ~10 miles of Two Harbors
Severity Distribution
within ~10 miles of Two Harbors
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Two Harbors, Brownfields runs higher than the national average — 55 sites within ~10 miles of Two Harbors. It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
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 Two Harbors
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 Two Harbors average
Your land is one point inside Two Harbors
Everything above resolves to Two Harbors 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 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 Two Harbors Average
Two Harbors Average
- ●USDA Zones 4b, averaged across Two Harbors
- ●One soil character for all of Two Harbors
- ●Frost dates read at Two Harbors's scale: May 1 to Oct 23
YOUR Parcel
- ✓Your exact zone, not Two Harbors's 4b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Two Harbors
Pull a site-specific report for your exact address in Two Harbors, Minnesota — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Two Harbors averages can't show:
We read public map data around Two Harbors — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Two Harbors average
How we know this about Two Harbors
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 Two Harbors’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 Two Harbors
When does frost risk typically end in Two Harbors?
The last hard freeze (28°F) in Two Harbors typically lands around May 1, 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 22.
When is the first frost in Two Harbors?
The first hard freeze (28°F) in Two Harbors typically arrives around Oct 23, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 9, so the watching starts about Sep 23 — about 175 days after the spring freeze cleared.
How long is the growing season in Two Harbors?
Measured between 28°F hard freezes, Two Harbors sees about 175 frost-free days — roughly May 1 through Oct 23, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 22 to Oct 9, about 140 days.
Is the soil safe to grow vegetables in Two Harbors?
The federal record around Two Harbors is a meaningful one — 108 documented sites, mostly Brownfields entries (55), 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 Two Harbors?
From about Sep 23 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 23 (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 23. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Two Harbors's scale — its 4b band and its 175-day season. Your yard writes its own version of Two Harbors'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 Two Harbors’s own scale
6 of the readings below were taken at Two Harbors's own scale — its own ~175-day season between 28°F freezes, the 2,095 acres it covers and 108 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Two Harbors's own USDA hardiness band, zones 4bUSDA PHZM 2023
- Two Harbors's own 28°F hard-freeze dates, about May 1 and Oct 23 and the ~175-day span between themNOAA 1991–2020 Climate Normals
- 108 documented contamination sites on the federal record near Two Harbors, the closest Brownfields record about 0.1 miles out from the town centreFederal environmental registers
- Two Harbors's boundary and the 2,095 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 4b and a ~175-day seasonGrowable Ground crop-matching engine
- The ecoregion at Two Harbors's own centroid, the Northern Lakes and ForestsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Two Harbors's 2,095 acres read through its county's SSURGO summaryfrom Lake County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Lake County
- The growing challenges every Minnesota grower plans around — written at state scale, so they stay on the state guidefrom Minnesota
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Lake County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Two Harbors's 2,095 acreswhy one lot differs from the next →
- Which side of Two Harbors you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 2,095 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 Two Harbors-wide figureread your own land →
More in Minnesota
Growing region
Nearby growing guides