Brunsville, Iowa, sits in USDA hardiness zone 5a — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
Crops well matched to these conditions include cabbage, cranberry, lavender, and collard greens — though what thrives on any one site still turns on its specific soil, sun, and drainage.
Even in Brunsville, 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 Brunsville 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 Brunsville — soil, climate, flood, and parcel records. How we handle your address.
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Brunsville — the short answer
Brunsville, Iowa: USDA zone 5a, about 180 days between hard freezes, across 149 acres of city.
- USDA zone
- 5a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 19
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 16
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~180
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 149 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 Brunsville's average, not your lot's — a low corner or a tree line moves it. Against Brunsville's 180-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Brunsville
Each reading below is measured for Brunsville itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredBrunsville runs about 180 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
MeasuredBrunsville 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 Brunsville is in
Brunsville sits in the Western Corn Belt Plains — EPA Level III, inside the wider Great Plains. That is read at Brunsville's own centroid rather than borrowed from Plymouth County.
What Grows in Brunsville
Every plant below cleared Brunsville's own zone 5a and its 180-day season. Each card opens that plant's Iowa profile. How we score.
Is it too late to plant in Brunsville?
Usually not — gardeners here simply switch what goes in the ground as the season moves. Cool-season crops can go in from around Mar 22; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 19 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 16 — 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 Brunsville
Closest first, within ~10 miles of Brunsville. Listing isn't leaking, and distance isn't exposure.
- 092N46W03CCAB 34672 1971Brunsville 3Nitrate · 900 ft
- PLYMOUTH COUNTY ENGINEERUnderground Storage Tanks · 1000 ft
- TAYLORS AUTOUnderground Storage Tanks · 1000 ft
- TAYLORS AUTOBrownfields · 1200 ft
- AT&T COMMUNICATIONSUnderground Storage Tanks · 1300 ft
- FLOYD VALLEY HOSPITALUnderground Storage Tanks · 2.1 mi
- MOORMAN MFG COMPANYUnderground Storage Tanks · 2.1 mi
- ADM ALLIANCE NUTRITION INCToxics Release Inventory · 2.6 mi
- NW FARM SERVICE COUnderground Storage Tanks · 2.6 mi
- FORMER JERRY''S PLACE/ SUSIE''S DELIUnderground Storage Tanks · 3.4 mi
- NORTHWEST IOWA POWER COOPERATIVEUnderground Storage Tanks · 3.4 mi
- LEMARS WATER DEPARTMENTPFAS · 4.1 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Brunsville'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 Brunsville.
Sources Checked
within ~10 miles of Brunsville
Severity Distribution
within ~10 miles of Brunsville
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Brunsville, two things run higher than the national average within ~10 miles of Brunsville — Superfund (3 sites) and Toxics Release Inventory (12 sites). It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
Superfund: Superfund sites represent the most severe contamination in the federal system.
Toxics Release Inventory: TRI facilities report annual chemical releases to air, water, and land.
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Check your specific parcel in Brunsville
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 Brunsville average
Your land is one point inside Brunsville
Everything above resolves to Brunsville as a whole — one PHZM band and one 28°F frost record, read across 149 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 Brunsville Average
Brunsville Average
- ●USDA Zones 5a, averaged across Brunsville
- ●One soil character for all of Brunsville
- ●Frost dates read at Brunsville's scale: Apr 19 to Oct 16
YOUR Parcel
- ✓Your exact zone, not Brunsville's 5a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Brunsville
Pull a site-specific report for your exact address in Brunsville, Iowa — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Brunsville averages can't show:
We read public map data around Brunsville — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Brunsville average
How we know this about Brunsville
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 Brunsville’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 Brunsville
When does frost risk typically end in Brunsville?
The last hard freeze (28°F) in Brunsville typically lands around Apr 19, 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 10.
When is the first frost in Brunsville?
The first hard freeze (28°F) in Brunsville typically arrives around Oct 16, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 2, so the watching starts about Sep 16 — about 180 days after the spring freeze cleared.
How long is the growing season in Brunsville?
Measured between 28°F hard freezes, Brunsville sees about 180 frost-free days — roughly Apr 19 through Oct 16, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 10 to Oct 2, about 145 days.
Is the soil safe to grow vegetables in Brunsville?
The federal record around Brunsville is a meaningful one — 169 documented sites, mostly Underground Storage Tanks entries (75), the nearest Nitrate record about 0.2 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 Brunsville?
From about Sep 16 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 16 (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 16. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Brunsville's scale — its 5a band and its 180-day season. Your yard writes its own version of Brunsville'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 Brunsville’s own scale
6 of the readings below were taken at Brunsville's own scale — its own ~180-day season between 28°F freezes, the 149 acres it covers and 169 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Brunsville's own USDA hardiness band, zones 5aUSDA PHZM 2023
- Brunsville's own 28°F hard-freeze dates, about Apr 19 and Oct 16 and the ~180-day span between themNOAA 1991–2020 Climate Normals
- 169 documented contamination sites on the federal record near Brunsville, the closest Nitrate record about 0.2 miles out from the town centreFederal environmental registers
- Brunsville's boundary and the 149 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 5a and a ~180-day seasonGrowable Ground crop-matching engine
- The ecoregion at Brunsville'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 Brunsville's 149 acres read through its county's SSURGO summaryfrom Plymouth County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Plymouth County
- The growing challenges every Iowa grower plans around — written at state scale, so they stay on the state guidefrom Iowa
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Plymouth County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Brunsville's 149 acreswhy one lot differs from the next →
- Which side of Brunsville you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 149 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Nitrate record about 0.2 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 Brunsville-wide figureread your own land →
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