Hudson, Wisconsin, sits in USDA hardiness zone 5a — room for a real mix of vegetables, fruit, and perennials matched to the local frost calendar.
Growers here do well with cabbage, cranberry, lavender, and collard greens — with the usual caveat that any single yard's soil, sun, and drainage cast the deciding vote.
Even in Hudson, 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 Hudson 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 Hudson — soil, climate, flood, and parcel records. How we handle your address.
No card required · your full report in seconds
Hudson — the short answer
Hudson, Wisconsin: USDA zone 5a, about 195 days between hard freezes, across 4K acres of city.
- USDA zone
- 5a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 13
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 25
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~195
- NOAA 1991–2020 Climate Normals, 28°F — this town
- City area
- 4K 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 Hudson's average, not your lot's — a low corner or a tree line moves it. Against Hudson's 195-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Hudson
Each reading below is measured for Hudson itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredHudson runs about 195 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
MeasuredHudson 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 Hudson is in
Hudson sits in the Western Corn Belt Plains — EPA Level III, inside the wider Great Plains. That is read at Hudson's own centroid rather than borrowed from St. Croix County.
What Grows in Hudson
Every plant below cleared Hudson's own zone 5a and its 195-day season. Each card opens that plant's Wisconsin profile. How we score.
Is it too late to plant in Hudson?
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 Mar 16; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 13 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 25 — long-season crops need about 90 days of runway, quick greens only 30. The tail of the season still works: sixty-day crops into late summer, quick greens after, garlic last of all.
What's on the federal record near Hudson
Closest first, within ~10 miles of Hudson. Listing isn't leaking, and distance isn't exposure.
- TRUE VALUE HARDWARE - PLAZA 94Brownfields · 250 ft
- Freedom Valu Center Inc #47Underground Storage Tanks · 500 ft
- WISCONSIN BELL PK7710 DBA SBC WISCBrownfields · 550 ft
- MICHAELS #5558Brownfields · 600 ft
- BILL'S GUN SHOP AND RANGEBrownfields · 650 ft
- Holiday #42Underground Storage Tanks · 650 ft
- HUDSON FORD LLCBrownfields · 800 ft
- CRESTVIEW DENTALBrownfields · 850 ft
- TARGET STORE T1235Brownfields · 900 ft
- CVS PHARMACY #16589Brownfields · 900 ft
- ABRA AUTO BODY & GLASS - HUDSONBrownfields · 1200 ft
- GERBER COLLISION & GLASS - HUDSONBrownfields · 1200 ft
6 more sites are on the record inside the same radius. See them on the map
Measured from Hudson'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 Hudson.
Sources Checked
within ~10 miles of Hudson
Severity Distribution
within ~10 miles of Hudson
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Hudson, Brownfields runs higher than the national average — 499 sites within ~10 miles of Hudson. It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
Brownfields: Brownfield sites are former commercial or industrial properties where legacy soil contamination (heavy metals, PAHs, petroleum compounds) may persist.
Check EPA brownfield remediation status — many sites have completed cleanup with institutional controls.
Check your specific parcel in Hudson
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 Hudson average
Your land is one point inside Hudson
Everything above resolves to Hudson as a whole — one PHZM band and one 28°F frost record, read across 4K 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 Hudson Average
Hudson Average
- ●USDA Zones 5a, averaged across Hudson
- ●One soil character for all of Hudson
- ●Frost dates read at Hudson's scale: Apr 13 to Oct 25
YOUR Parcel
- ✓Your exact zone, not Hudson's 5a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Hudson
Pull a site-specific report for your exact address in Hudson, Wisconsin — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Hudson averages can't show:
We read public map data around Hudson — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Hudson average
How we know this about Hudson
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 Hudson’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 Hudson
When does frost risk typically end in Hudson?
The last hard freeze (28°F) in Hudson typically lands around Apr 13, 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 4.
When is the first frost in Hudson?
The first hard freeze (28°F) in Hudson typically arrives around Oct 25, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 11, so the watching starts about Sep 25 — about 195 days after the spring freeze cleared.
How long is the growing season in Hudson?
Measured between 28°F hard freezes, Hudson sees about 195 frost-free days — roughly Apr 13 through Oct 25, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 4 to Oct 11, about 160 days.
Is the soil safe to grow vegetables in Hudson?
The federal record around Hudson is a meaningful one — 1,023 documented sites, mostly Brownfields entries (499), the nearest Brownfields 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 Hudson?
From about Sep 25 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 25 (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 25. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Hudson's scale — its 5a band and its 195-day season. Your yard writes its own version of Hudson'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 Hudson’s own scale
6 of the readings below were taken at Hudson's own scale — its own ~195-day season between 28°F freezes, the 4,368 acres it covers and 1,023 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Hudson's own USDA hardiness band, zones 5aUSDA PHZM 2023
- Hudson's own 28°F hard-freeze dates, about Apr 13 and Oct 25 and the ~195-day span between themNOAA 1991–2020 Climate Normals
- 1,023 documented contamination sites on the federal record near Hudson, the closest Brownfields record under a tenth of a mile out from the town centreFederal environmental registers
- Hudson's boundary and the 4,368 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 5a and a ~195-day seasonGrowable Ground crop-matching engine
- The ecoregion at Hudson'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 Hudson's 4,368 acres read through its county's SSURGO summaryfrom St. Croix County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom St. Croix 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 St. Croix County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Hudson's 4,368 acreswhy one lot differs from the next →
- Which side of Hudson you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 4,368 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 Hudson-wide figureread your own land →
More in Wisconsin
Wider growing context
What grows across WisconsinHudson sits outside our named growing regions, so Wisconsin as a whole is its closest context here.
Nearby growing guides