North Mankato, Minnesota, sits in USDA hardiness zone 5a — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
A short list that earns its place here — cabbage, cranberry, lavender, and collard greens — with any one site's soil, sun, and drainage making the final cut.
Even in North Mankato, 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 North Mankato 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 North Mankato — soil, climate, flood, and parcel records. How we handle your address.
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North Mankato — the short answer
North Mankato, Minnesota: USDA zone 5a, about 184 days between hard freezes, across 4K acres of city.
- USDA zone
- 5a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 17
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 18
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~184
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 4K 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 5a is North Mankato's average, not your lot's — a low corner or a tree line moves it. Against North Mankato's 184-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in North Mankato
Each reading below is measured for North Mankato itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredNorth Mankato runs about 184 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
MeasuredNorth Mankato sits in USDA hardiness zone 5a.
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 North Mankato is in
North Mankato sits in the Western Corn Belt Plains — EPA Level III, inside the wider Great Plains. That is read at North Mankato's own centroid rather than borrowed from Nicollet County.
What Grows in North Mankato
Every plant below cleared North Mankato's own zone 5a and its 184-day season. Each card opens that plant's Minnesota profile. How we score.
Is it too late to plant in North Mankato?
Too late for some crops, right on time for others — a growing season is a sequence, not a deadline. Cool-season crops can go in from around Mar 20; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 17 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 18 — long-season crops need about 90 days of runway, quick greens only 30. As the window narrows, the plantings just get faster — fall brassicas, then greens, then garlic to finish.
What's on the federal record near North Mankato
Closest first, within ~10 miles of North Mankato. Listing isn't leaking, and distance isn't exposure.
- ARNOLD'S OF MANKATOBrownfields · 500 ft
- RDO EQUIPMENT CO - NORTH MANKATOBrownfields · 1000 ft
- RDO Equipment Co - North MankatoUnderground Storage Tanks · 1000 ft
- CLIFF VIESSMAN INCBrownfields · 1400 ft
- NORTH CENTRAL INTERNATIONALBrownfields · 1500 ft
- MANKATO UPTOWN DIALYSISBrownfields · 1500 ft
- Kwik Trip 615Underground Storage Tanks · 1700 ft
- DOLLAR TREE 05417Brownfields · 1700 ft
- Rays MarketUnderground Storage Tanks · 1700 ft
- COLOPLAST MANUFACTURING US LLC-MANKATOToxics Release Inventory · 1800 ft
- COLOPLAST MANUFACTURING US LLC-MANKATOBrownfields · 1800 ft
- Dairy Queen/conocoUnderground Storage Tanks · 1900 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from North Mankato'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 North Mankato.
Sources Checked
within ~10 miles of North Mankato
Severity Distribution
within ~10 miles of North Mankato
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around North Mankato, two things run higher than the national average within ~10 miles of North Mankato — Toxics Release Inventory (48 sites) and Brownfields (371 sites). That's not a problem with your land — it's information about it.
Toxics Release Inventory: TRI facilities report annual chemical releases to air, water, and land.
Brownfields: Brownfield sites are former commercial or industrial properties where legacy soil contamination (heavy metals, PAHs, petroleum compounds) may persist.
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Check EPA brownfield remediation status — many sites have completed cleanup with institutional controls.
Check your specific parcel in North Mankato
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 North Mankato average
Your land is one point inside North Mankato
Everything above resolves to North Mankato as a whole — one PHZM band and one 28°F frost record, read across 4K 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 North Mankato Average
North Mankato Average
- ●USDA Zones 5a, averaged across North Mankato
- ●One soil character for all of North Mankato
- ●Frost dates read at North Mankato's scale: Apr 17 to Oct 18
YOUR Parcel
- ✓Your exact zone, not North Mankato's 5a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in North Mankato
Pull a site-specific report for your exact address in North Mankato, Minnesota — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that North Mankato averages can't show:
We read public map data around North Mankato — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the North Mankato average
How we know this about North Mankato
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 North Mankato’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 North Mankato
When does frost risk typically end in North Mankato?
The last hard freeze (28°F) in North Mankato typically lands around Apr 17, 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 8.
When is the first frost in North Mankato?
The first hard freeze (28°F) in North Mankato typically arrives around Oct 18, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 4, so the watching starts about Sep 18 — about 184 days after the spring freeze cleared.
How long is the growing season in North Mankato?
Measured between 28°F hard freezes, North Mankato sees about 184 frost-free days — roughly Apr 17 through Oct 18, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 8 to Oct 4, about 149 days.
Is the soil safe to grow vegetables in North Mankato?
The federal record around North Mankato is a meaningful one — 734 documented sites, mostly Brownfields entries (371), the nearest Brownfields record under a tenth of a mile 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 North Mankato?
From about Sep 18 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 18 (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 18. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at North Mankato's scale — its 5a band and its 184-day season. Your yard writes its own version of North Mankato'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 North Mankato’s own scale
6 of the readings below were taken at North Mankato's own scale — its own ~184-day season between 28°F freezes, the 4,120 acres it covers and 734 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- North Mankato's own USDA hardiness band, zones 5aUSDA PHZM 2023
- North Mankato's own 28°F hard-freeze dates, about Apr 17 and Oct 18 and the ~184-day span between themNOAA 1991–2020 Climate Normals
- 734 documented contamination sites on the federal record near North Mankato, the closest Brownfields record under a tenth of a mile out from the town centreFederal environmental registers
- North Mankato's boundary and the 4,120 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 5a and a ~184-day seasonGrowable Ground crop-matching engine
- The ecoregion at North Mankato's own centroid, the Western Corn Belt PlainsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so North Mankato's 4,120 acres read through its county's SSURGO summaryfrom Nicollet County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Nicollet 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 Nicollet County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among North Mankato's 4,120 acreswhy one lot differs from the next →
- Which side of North Mankato you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 4,120 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields record under a tenth of a mile 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 North Mankato-wide figureread your own land →
More in Minnesota
Wider growing context
What grows across MinnesotaNorth Mankato sits outside our named growing regions, so Minnesota as a whole is its closest context here.
Nearby growing guides