Big Falls, Minnesota, sits in USDA hardiness zone 3b — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
Well-matched crops include cabbage, cranberry, epazote, and collard greens, and the gap between "grows in the area" and "grows in your yard" is closed by soil, sun, and drainage.
Even in Big Falls, 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 Big Falls 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 Big Falls — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Big Falls — the short answer
Big Falls, Minnesota: USDA zone 3b, about 146 days between hard freezes, across 4K acres of city.
- USDA zone
- 3b
- USDA PHZM 2023
- Last hard freeze (28°F)
- May 8
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 1
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~146
- 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 3b is Big Falls's average, not your lot's — a low corner or a tree line moves it. Against Big Falls's 146-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Big Falls
Each reading below is measured for Big Falls itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredBig Falls runs about 146 days between hard freezes — a short growing season.
Long-maturing crops like melons, sweet potatoes, and winter squash can run out of runway before the first hard freeze, ripening late or not at all.
Lead with fast-maturing varieties, and stretch the season on both ends with cold frames, low tunnels, or a greenhouse.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredBig Falls sits in USDA hardiness zone 3b.
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 Big Falls is in
Big Falls sits in the Northern Minnesota Wetlands — EPA Level III, inside the wider Northern Forests. That is read at Big Falls's own centroid rather than borrowed from Koochiching County.
What Grows in Big Falls
Every plant below cleared Big Falls's own zone 3b and its 146-day season. Each card opens that plant's Minnesota profile. How we score.
Is it too late to plant in Big Falls?
Rarely: the season closes in stages, not all at once, and each stage has its crops. Cool-season crops can go in from around Apr 10; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near May 8 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 1 — long-season crops need about 90 days of runway, quick greens only 30. Even here the calendar’s edges hold value: thirty-day greens late in the window, then garlic and a rested bed for spring.
What's on the federal record near Big Falls
Closest first, within ~10 miles of Big Falls. Listing isn't leaking, and distance isn't exposure.
- Promersberger's CornerUnderground Storage Tanks · 0.8 mi
- KOOCHICHING COUNTY HIGHWAY DEBrownfields · 0.9 mi
- PAGE & HILL FOREST PRODUCTS INCToxics Release Inventory · 1.4 mi
- Erics PlaceUnderground Storage Tanks · 4.7 mi
- Bureau Of Indian AffairsUnderground Storage Tanks · 4.7 mi
- Roches AmocoUnderground Storage Tanks · 6.6 mi
- Big Falls AirportUnderground Storage Tanks · 6.6 mi
- County Highway Garage - Big FallsUnderground Storage Tanks · 6.6 mi
- Forestry Dist Headquarters (dnr)Underground Storage Tanks · 6.6 mi
- STANS WOOD CHIPSBrownfields · 8.5 mi
Measured from Big Falls'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 Big Falls.
Total Sites
10
within ~10 miles of Big Falls
Risk Level
Low
Highest-severity
1 Toxics Release Inventory facility
Sources Checked
within ~10 miles of Big Falls
Severity Distribution
within ~10 miles of Big Falls
Highest-Severity Sites
Know Before You Grow
- •Underground tanks leak petroleum as they age — near a former filling station, test the soil.
- •Near a brownfield, raised beds of imported soil give your food clean ground.
- •TRI facilities report what they release. Check the wind — downwind beds catch more of it.
Check your specific parcel in Big Falls
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 Big Falls average
Your land is one point inside Big Falls
Everything above resolves to Big Falls 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 Big Falls Average
Big Falls Average
- ●USDA Zones 3b, averaged across Big Falls
- ●One soil character for all of Big Falls
- ●Frost dates read at Big Falls's scale: May 8 to Oct 1
YOUR Parcel
- ✓Your exact zone, not Big Falls's 3b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Big Falls
Pull a site-specific report for your exact address in Big Falls, Minnesota — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Big Falls averages can't show:
We read public map data around Big Falls — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Big Falls average
How we know this about Big Falls
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 Big Falls’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 Big Falls
When does frost risk typically end in Big Falls?
The last hard freeze (28°F) in Big Falls typically lands around May 8, 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 29.
When is the first frost in Big Falls?
The first hard freeze (28°F) in Big Falls typically arrives around Oct 1, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Sep 17, so the watching starts about Sep 1 — about 146 days after the spring freeze cleared.
How long is the growing season in Big Falls?
Measured between 28°F hard freezes, Big Falls sees about 146 frost-free days — roughly May 8 through Oct 1, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 29 to Sep 17, about 111 days.
Is the soil safe to grow vegetables in Big Falls?
The federal record around Big Falls is light — 10 documented sites across the 9 federal source types we checked, mostly Underground Storage Tanks entries (7), the nearest Underground Storage Tanks record about 0.8 miles out — and proximity to a documented site is information, not a diagnosis of any one yard. Growing food here starts from a strong position; a soil test before new food beds settles any site-specific question.
How do gardeners stretch the season in Big Falls?
With about 146 frost-free days between hard freezes, Big Falls rewards the classic extension moves: floating row cover buys roughly two to four extra weeks at each shoulder — on this season that is a working window nearer 174 to 202 days — and cold frames or low tunnels buy more. Starting transplants indoors ahead of the May 8 hard-freeze normal stretches the season without touching the calendar.
Everything above is measured at Big Falls's scale — its 3b band and its 146-day season. Your yard writes its own version of Big Falls'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 Big Falls’s own scale
6 of the readings below were taken at Big Falls's own scale — its own ~146-day season between 28°F freezes, the 3,868 acres it covers and 10 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Big Falls's own USDA hardiness band, zones 3bUSDA PHZM 2023
- Big Falls's own 28°F hard-freeze dates, about May 8 and Oct 1 and the ~146-day span between themNOAA 1991–2020 Climate Normals
- 10 documented contamination sites on the federal record near Big Falls, the closest Underground Storage Tanks record about 0.8 miles out from the town centreFederal environmental registers
- Big Falls's boundary and the 3,868 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 3b and a ~146-day seasonGrowable Ground crop-matching engine
- The ecoregion at Big Falls's own centroid, the Northern Minnesota WetlandsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Big Falls's 3,868 acres read through its county's SSURGO summaryfrom Koochiching County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Koochiching 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 Koochiching County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Big Falls's 3,868 acreswhy one lot differs from the next →
- Which side of Big Falls you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 3,868 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.8 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 Big Falls-wide figureread your own land →
More in Minnesota
Wider growing context
What grows across MinnesotaBig Falls sits outside our named growing regions, so Minnesota as a whole is its closest context here.
Nearby growing guides