Radisson, Wisconsin, sits in USDA hardiness zone 4a — a zone band wide enough that plant choice, not possibility, is the interesting question.
On paper, cabbage, cranberry, turkish rocket, and collard greens all suit these conditions — on the ground, soil, sun, and drainage make the final call.
Even in Radisson, 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 Radisson 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 Radisson — soil, climate, flood, and parcel records. How we handle your address.
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Radisson — the short answer
Radisson, Wisconsin: USDA zone 4a, about 154 days between hard freezes, across 252 acres of town.
- USDA zone
- 4a
- USDA PHZM 2023
- Last hard freeze (28°F)
- May 5
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 6
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~154
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 252 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 4a is Radisson's average, not your lot's — a low corner or a tree line moves it. Against Radisson's 154-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Radisson
Each reading below is measured for Radisson itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredRadisson runs about 154 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
MeasuredRadisson sits in USDA hardiness zone 4a.
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 Radisson is in
Radisson sits in the Northern Lakes and Forests — EPA Level III, inside the wider Northern Forests. That is read at Radisson's own centroid rather than borrowed from Sawyer County.
What Grows in Radisson
Every plant below cleared Radisson's own zone 4a and its 154-day season. Each card opens that plant's Wisconsin profile. How we score.
Is it too late to plant in Radisson?
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 Apr 7; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near May 5 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 6 — long-season crops need about 90 days of runway, quick greens only 30. Late in the year the fall bench takes over — quick greens, radishes, and garlic that repays you next summer.
What's on the federal record near Radisson
Closest first, within ~10 miles of Radisson. Listing isn't leaking, and distance isn't exposure.
- MARSHFIELD CLINICUnderground Storage Tanks · 250 ft
- TNT FUEL & FOODUnderground Storage Tanks · 1200 ft
- G1 Fuel & FoodUnderground Storage Tanks · 1200 ft
- THORSON BLDGUnderground Storage Tanks · 1200 ft
- RAYMOND SIGNSUnderground Storage Tanks · 1200 ft
- DOLLAR GENERAL STORE 20333Brownfields · 1300 ft
- NORTH CENTRAL POWER COMPANY-RADISSONBrownfields · 2500 ft
- RADISSON WATER SUPPLYSuperfund · 0.6 mi
- Adams StdUnderground Storage Tanks · 1.0 mi
- RADISSON CONCRETE INCUnderground Storage Tanks · 1.0 mi
- TOWN OF RADISSONUnderground Storage Tanks · 1.0 mi
- WALTERS BROS LUMBER MFG INCUnderground Storage Tanks · 1.0 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Radisson'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 Radisson.
Total Sites
66
within ~10 miles of Radisson
Risk Level
Elevated
Highest-severity
1 Superfund site (none NPL-listed)
Sources Checked
within ~10 miles of Radisson
Severity Distribution
within ~10 miles of Radisson
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Radisson, Underground Storage Tanks runs higher than the national average — 51 sites within ~10 miles of Radisson. It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
Underground Storage Tanks: Underground storage tanks are the single most common source of soil contamination near homes and gardens.
Use raised beds with imported soil — this eliminates the primary soil-contact pathway.
Check your specific parcel in Radisson
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 Radisson average
Your land is one point inside Radisson
Everything above resolves to Radisson as a whole — one PHZM band and one 28°F frost record, read across 252 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 Radisson Average
Radisson Average
- ●USDA Zones 4a, averaged across Radisson
- ●One soil character for all of Radisson
- ●Frost dates read at Radisson's scale: May 5 to Oct 6
YOUR Parcel
- ✓Your exact zone, not Radisson's 4a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Radisson
Pull a site-specific report for your exact address in Radisson, Wisconsin — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Radisson averages can't show:
We read public map data around Radisson — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Radisson average
How we know this about Radisson
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 Radisson’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 Radisson
When does frost risk typically end in Radisson?
The last hard freeze (28°F) in Radisson typically lands around May 5, 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 26.
When is the first frost in Radisson?
The first hard freeze (28°F) in Radisson typically arrives around Oct 6, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Sep 22, so the watching starts about Sep 6 — about 154 days after the spring freeze cleared.
How long is the growing season in Radisson?
Measured between 28°F hard freezes, Radisson sees about 154 frost-free days — roughly May 5 through Oct 6, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 26 to Sep 22, about 119 days.
Is the soil safe to grow vegetables in Radisson?
The federal record around Radisson is a meaningful one — 66 documented sites, mostly Underground Storage Tanks entries (51), 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 Radisson?
From about Sep 6 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 6 (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 6. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Radisson's scale — its 4a band and its 154-day season. Your yard writes its own version of Radisson'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 Radisson’s own scale
6 of the readings below were taken at Radisson's own scale — its own ~154-day season between 28°F freezes, the 252 acres it covers and 66 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Radisson's own USDA hardiness band, zones 4aUSDA PHZM 2023
- Radisson's own 28°F hard-freeze dates, about May 5 and Oct 6 and the ~154-day span between themNOAA 1991–2020 Climate Normals
- 66 documented contamination sites on the federal record near Radisson, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- Radisson's boundary and the 252 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 4a and a ~154-day seasonGrowable Ground crop-matching engine
- The ecoregion at Radisson's own centroid, the Northern Lakes and ForestsUS EPA Level III Ecoregions
Inherited from a wider read
- Soil character — no town-scale survey exists, so Radisson's 252 acres read through its county's SSURGO summaryfrom Sawyer County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Sawyer 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 Sawyer County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Radisson's 252 acreswhy one lot differs from the next →
- Which side of Radisson you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 252 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 Radisson-wide figureread your own land →
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