Buffalo Center, Iowa, sits in USDA hardiness zone 5a — 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, lavender, 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 Buffalo Center, 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 Buffalo Center 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 Buffalo Center — soil, climate, flood, and parcel records. How we handle your address.
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Buffalo Center — the short answer
Buffalo Center, Iowa: USDA zone 5a, about 184 days between hard freezes, across 685 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
- 685 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 Buffalo Center's average, not your lot's — a low corner or a tree line moves it. Against Buffalo Center's 184-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Buffalo Center
Each reading below is measured for Buffalo Center itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredBuffalo Center 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
MeasuredBuffalo Center 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 Buffalo Center is in
Buffalo Center sits in the Western Corn Belt Plains — EPA Level III, inside the wider Great Plains. That is read at Buffalo Center's own centroid rather than borrowed from Winnebago County.
What Grows in Buffalo Center
Every plant below cleared Buffalo Center's own zone 5a and its 184-day season. Each card opens that plant's Iowa profile. How we score.
Is it too late to plant in Buffalo Center?
Usually not — gardeners here simply switch what goes in the ground as the season moves. 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. Even past midsummer there is room for a true fall garden here, and garlic planted near the close carries the momentum into next year.
What's on the federal record near Buffalo Center
Closest first, within ~10 miles of Buffalo Center. Listing isn't leaking, and distance isn't exposure.
- CASEYS GENERAL STORE 3262Underground Storage Tanks · 1300 ft
- BUFFALO CENTER-RAKE COM SCHOOLUnderground Storage Tanks · 1500 ft
- NORTH IOWA HIGH SCHOOLBrownfields · 1500 ft
- WINNEBAGO COUNTY SHEDUnderground Storage Tanks · 1800 ft
- D & J WINKLEMAN FARMS INCUnderground Storage Tanks · 1800 ft
- LAWRENCE PITKINUnderground Storage Tanks · 1800 ft
- FRIESENBORG & LARSON INCUnderground Storage Tanks · 1800 ft
- BUFFALO CENTER CARDTROLUnderground Storage Tanks · 1900 ft
- SLEPER OIL COMPANYUnderground Storage Tanks · 2500 ft
- CASEY''S GENERAL STORE #2801Underground Storage Tanks · 0.5 mi
- BUFFALO CENTER SHOPUnderground Storage Tanks · 0.5 mi
- 099N26W18DACD 10664 1959Buffalo Center 1Nitrate · 0.6 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Buffalo Center'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 Buffalo Center.
Total Sites
54
within ~10 miles of Buffalo Center
Risk Level
Moderate
Highest-severity
2 concentrated animal feeding operations
Sources Checked
within ~10 miles of Buffalo Center
Severity Distribution
within ~10 miles of Buffalo Center
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Buffalo Center, Nitrate runs higher than the national average — 22 sites within ~10 miles of Buffalo Center. That's not a problem with your land — it's information about it.
Nitrate: Nitrate contamination primarily comes from agricultural fertilizer runoff and failing septic systems.
Test well water for nitrate if you rely on a private well for irrigation (EPA standard: 10 mg/L).
Check your specific parcel in Buffalo Center
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 Buffalo Center average
Your land is one point inside Buffalo Center
Everything above resolves to Buffalo Center as a whole — one PHZM band and one 28°F frost record, read across 685 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 Buffalo Center Average
Buffalo Center Average
- ●USDA Zones 5a, averaged across Buffalo Center
- ●One soil character for all of Buffalo Center
- ●Frost dates read at Buffalo Center's scale: Apr 17 to Oct 18
YOUR Parcel
- ✓Your exact zone, not Buffalo Center's 5a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Buffalo Center
Pull a site-specific report for your exact address in Buffalo Center, Iowa — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Buffalo Center averages can't show:
We read public map data around Buffalo Center — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Buffalo Center average
How we know this about Buffalo Center
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 Buffalo Center’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 Buffalo Center
When does frost risk typically end in Buffalo Center?
The last hard freeze (28°F) in Buffalo Center 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 Buffalo Center?
The first hard freeze (28°F) in Buffalo Center 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 Buffalo Center?
Measured between 28°F hard freezes, Buffalo Center 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 Buffalo Center?
The federal record around Buffalo Center shows 54 documented sites, mostly Underground Storage Tanks entries (26), the nearest Underground Storage Tanks record about 0.2 miles out — a typical footprint for a growing area, and proximity to a documented site is information, not a diagnosis of any one yard. It's worth seeing which recorded sites sit closest to where you grow, and testing the soil before new food beds near any of them.
How do I protect my plants from frost in Buffalo Center?
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 Buffalo Center's scale — its 5a band and its 184-day season. Your yard writes its own version of Buffalo Center'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 Buffalo Center’s own scale
6 of the readings below were taken at Buffalo Center's own scale — its own ~184-day season between 28°F freezes, the 685 acres it covers and 54 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Buffalo Center's own USDA hardiness band, zones 5aUSDA PHZM 2023
- Buffalo Center's own 28°F hard-freeze dates, about Apr 17 and Oct 18 and the ~184-day span between themNOAA 1991–2020 Climate Normals
- 54 documented contamination sites on the federal record near Buffalo Center, the closest Underground Storage Tanks record about 0.2 miles out from the town centreFederal environmental registers
- Buffalo Center's boundary and the 685 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 Buffalo Center'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 Buffalo Center's 685 acres read through its county's SSURGO summaryfrom Winnebago County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Winnebago 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 Winnebago County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Buffalo Center's 685 acreswhy one lot differs from the next →
- Which side of Buffalo Center you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 685 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks 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 Buffalo Center-wide figureread your own land →
More in Iowa
Wider growing context
What grows across IowaBuffalo Center sits outside our named growing regions, so Iowa as a whole is its closest context here.