Osceola, Wisconsin, sits in USDA hardiness zone 4b — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
Reliable performers under these conditions include cabbage, cranberry, turkish rocket, and collard greens; what your own ground favors still comes down to its soil, sun, and drainage.
Even in Osceola, 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 Osceola 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 Osceola — soil, climate, flood, and parcel records. How we handle your address.
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Osceola — the short answer
Osceola, Wisconsin: USDA zone 4b, about 176 days between hard freezes, across 3K acres of town.
- USDA zone
- 4b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 24
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 17
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~176
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 3K 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 Osceola's average, not your lot's — a low corner or a tree line moves it. Against Osceola's 176-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Osceola
Each reading below is measured for Osceola itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredOsceola runs about 176 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
MeasuredOsceola 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 Osceola is in
Osceola sits in the North Central Hardwood Forests — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Osceola's own centroid rather than borrowed from Polk County.
What Grows in Osceola
Every plant below cleared Osceola's own zone 4b and its 176-day season. Each card opens that plant's Wisconsin profile. How we score.
Is it too late to plant in Osceola?
Rarely: the season closes in stages, not all at once, and each stage has its crops. Cool-season crops can go in from around Mar 27; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 24 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 17 — 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 Osceola
Closest first, within ~10 miles of Osceola. Listing isn't leaking, and distance isn't exposure.
- DONALD FEHLENUnderground Storage Tanks · 450 ft
- Minit Mart #502Underground Storage Tanks · 1200 ft
- SCHOOL DISTRICT OF OSCEOLAUnderground Storage Tanks · 2000 ft
- OSCEOLA AREA SCHOOLS BUS GARAGEBrownfields · 2000 ft
- NICKELSON PLASTICS INCBrownfields · 2200 ft
- PK-33/19W/27-0085Nitrate · 2200 ft
- KROY INCBrownfields · 2300 ft
- Eliasco IncUnderground Storage Tanks · 2300 ft
- OSCEOLA SENIOR HIGH SCHOOLBrownfields · 2300 ft
- William E FogertyUnderground Storage Tanks · 2400 ft
- Cascade BpUnderground Storage Tanks · 2400 ft
- OSCEOLA LIQUOR & GASUnderground Storage Tanks · 2400 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Osceola'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 Osceola.
Total Sites
372
within ~10 miles of Osceola
Risk Level
Elevated
Highest-severity
1 Superfund site (none NPL-listed)
Sources Checked
within ~10 miles of Osceola
Severity Distribution
within ~10 miles of Osceola
Highest-Severity Sites
Know Before You Grow
- •Near a brownfield, raised beds of imported soil give your food clean ground.
- •Underground tanks leak petroleum as they age — near a former filling station, test the soil.
- •On a private well, test for nitrates: above 10 mg/L the water needs treatment before irrigating.
Check your specific parcel in Osceola
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 Osceola average
Your land is one point inside Osceola
Everything above resolves to Osceola as a whole — one PHZM band and one 28°F frost record, read across 3K 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 town 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 Osceola Average
Osceola Average
- ●USDA Zones 4b, averaged across Osceola
- ●One soil character for all of Osceola
- ●Frost dates read at Osceola's scale: Apr 24 to Oct 17
YOUR Parcel
- ✓Your exact zone, not Osceola's 4b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Osceola
Pull a site-specific report for your exact address in Osceola, Wisconsin — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Osceola averages can't show:
We read public map data around Osceola — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Osceola average
How we know this about Osceola
The datasets: hardiness from the USDA ARS Plant Hardiness Zone Map 2023, read at this town’s own centroid; hard-freeze dates from NOAA 1991–2020 28°F normals at Osceola’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 town grain anywhere on this page — there is no town-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 Osceola
When does frost risk typically end in Osceola?
The last hard freeze (28°F) in Osceola typically lands around Apr 24, 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 15.
When is the first frost in Osceola?
The first hard freeze (28°F) in Osceola typically arrives around Oct 17, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 3, so the watching starts about Sep 17 — about 176 days after the spring freeze cleared.
How long is the growing season in Osceola?
Measured between 28°F hard freezes, Osceola sees about 176 frost-free days — roughly Apr 24 through Oct 17, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 15 to Oct 3, about 141 days.
Is the soil safe to grow vegetables in Osceola?
The federal record around Osceola is a meaningful one — 372 documented sites, mostly Brownfields entries (134), the nearest Underground Storage Tanks 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 Osceola?
From about Sep 17 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 17 (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 17. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Osceola's scale — its 4b band and its 176-day season. Your yard writes its own version of Osceola'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 Osceola’s own scale
6 of the readings below were taken at Osceola's own scale — its own ~176-day season between 28°F freezes, the 2,598 acres it covers and 372 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Osceola's own USDA hardiness band, zones 4bUSDA PHZM 2023
- Osceola's own 28°F hard-freeze dates, about Apr 24 and Oct 17 and the ~176-day span between themNOAA 1991–2020 Climate Normals
- 372 documented contamination sites on the federal record near Osceola, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- Osceola's boundary and the 2,598 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 4b and a ~176-day seasonGrowable Ground crop-matching engine
- The ecoregion at Osceola's own centroid, the North Central Hardwood ForestsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Osceola's 2,598 acres read through its county's SSURGO summaryfrom Polk County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Polk County
- The growing challenges every Wisconsin grower plans around — written at state scale, so they stay on the state guidefrom Wisconsin
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom Polk County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Osceola's 2,598 acreswhy one lot differs from the next →
- Which side of Osceola you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 2,598 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks 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 Osceola-wide figureread your own land →
More in Wisconsin
Wider growing context
What grows across WisconsinOsceola sits outside our named growing regions, so Wisconsin as a whole is its closest context here.
Nearby growing guides