Spooner, Wisconsin, sits in USDA hardiness zone 4a — enough range to grow cool-season vegetables, hardy fruit, and warm-season crops that mature before the first hard frost.
A short list that earns its place here — cabbage, cranberry, turkish rocket, and collard greens — with any one site's soil, sun, and drainage making the final cut.
Even in Spooner, 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 Spooner 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 Spooner — soil, climate, flood, and parcel records. How we handle your address.
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Spooner — the short answer
Spooner, Wisconsin: USDA zone 4a, about 158 days between hard freezes, across 3K acres of city.
- USDA zone
- 4a
- USDA PHZM 2023
- Last hard freeze (28°F)
- May 3
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 8
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~158
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City 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 4a is Spooner's average, not your lot's — a low corner or a tree line moves it. Against Spooner's 158-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Spooner
Each reading below is measured for Spooner itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredSpooner runs about 158 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
MeasuredSpooner 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 Spooner is in
Spooner sits in the Northern Lakes and Forests — EPA Level III, inside the wider Northern Forests. That is read at Spooner's own centroid rather than borrowed from Washburn County.
What Grows in Spooner
Every plant below cleared Spooner's own zone 4a and its 158-day season. Each card opens that plant's Wisconsin profile. How we score.
Is it too late to plant in Spooner?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Apr 5; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near May 3 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 8 — 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 Spooner
Closest first, within ~10 miles of Spooner. Listing isn't leaking, and distance isn't exposure.
- KENS TIRE SERVICEBrownfields · 250 ft
- TIRE & ELECTRICUnderground Storage Tanks · 400 ft
- Usda Area OfficeUnderground Storage Tanks · 400 ft
- SPOONER BUMPER TO BUMPERBrownfields · 500 ft
- PATRICK INSURANCE AGENCYUnderground Storage Tanks · 650 ft
- FIDDLE STICKSUnderground Storage Tanks · 650 ft
- WB-39/12W/32-0055Nitrate · 700 ft
- CASTER MEYER REALTYUnderground Storage Tanks · 700 ft
- ERA RINGLIEN INCUnderground Storage Tanks · 700 ft
- GARYS CONOCOUnderground Storage Tanks · 750 ft
- KRONLUNDS MOTORS INCUnderground Storage Tanks · 750 ft
- HANK & JONSBrownfields · 750 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Spooner'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 Spooner.
Total Sites
186
within ~10 miles of Spooner
Risk Level
Moderate
Highest-severity
1 Toxics Release Inventory facility
Sources Checked
within ~10 miles of Spooner
Severity Distribution
within ~10 miles of Spooner
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.
- •On a private well, test for nitrates: above 10 mg/L the water needs treatment before irrigating.
Check your specific parcel in Spooner
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 Spooner average
Your land is one point inside Spooner
Everything above resolves to Spooner 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 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 Spooner Average
Spooner Average
- ●USDA Zones 4a, averaged across Spooner
- ●One soil character for all of Spooner
- ●Frost dates read at Spooner's scale: May 3 to Oct 8
YOUR Parcel
- ✓Your exact zone, not Spooner's 4a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Spooner
Pull a site-specific report for your exact address in Spooner, Wisconsin — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Spooner averages can't show:
We read public map data around Spooner — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Spooner average
How we know this about Spooner
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 Spooner’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 Spooner
When does frost risk typically end in Spooner?
The last hard freeze (28°F) in Spooner typically lands around May 3, 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 24.
When is the first frost in Spooner?
The first hard freeze (28°F) in Spooner typically arrives around Oct 8, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Sep 24, so the watching starts about Sep 8 — about 158 days after the spring freeze cleared.
How long is the growing season in Spooner?
Measured between 28°F hard freezes, Spooner sees about 158 frost-free days — roughly May 3 through Oct 8, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 24 to Sep 24, about 123 days.
Is the soil safe to grow vegetables in Spooner?
The federal record around Spooner shows 186 documented sites, mostly Underground Storage Tanks entries (112), the nearest Brownfields record under a tenth of a mile 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 Spooner?
From about Sep 8 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 8 (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 8. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Spooner's scale — its 4a band and its 158-day season. Your yard writes its own version of Spooner'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 Spooner’s own scale
6 of the readings below were taken at Spooner's own scale — its own ~158-day season between 28°F freezes, the 2,582 acres it covers and 186 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Spooner's own USDA hardiness band, zones 4aUSDA PHZM 2023
- Spooner's own 28°F hard-freeze dates, about May 3 and Oct 8 and the ~158-day span between themNOAA 1991–2020 Climate Normals
- 186 documented contamination sites on the federal record near Spooner, the closest Brownfields record under a tenth of a mile out from the town centreFederal environmental registers
- Spooner's boundary and the 2,582 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 4a and a ~158-day seasonGrowable Ground crop-matching engine
- The ecoregion at Spooner'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 Spooner's 2,582 acres read through its county's SSURGO summaryfrom Washburn County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Washburn 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 Washburn County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Spooner's 2,582 acreswhy one lot differs from the next →
- Which side of Spooner you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 2,582 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Brownfields 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 Spooner-wide figureread your own land →
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