Glen Flora, Wisconsin, sits in USDA hardiness zone 4a — a zone band wide enough that plant choice, not possibility, is the interesting question.
Crops well matched to these conditions include cabbage, cranberry, turkish rocket, and collard greens — though what thrives on any one site still turns on its specific soil, sun, and drainage.
Even in Glen Flora, 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 Glen Flora 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 Glen Flora — soil, climate, flood, and parcel records. How we handle your address.
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Glen Flora — the short answer
Glen Flora, Wisconsin: USDA zone 4a, about 159 days between hard freezes, across 362 acres of town.
- 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 9
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~159
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 362 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 Glen Flora's average, not your lot's — a low corner or a tree line moves it. Against Glen Flora's 159-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Glen Flora
Each reading below is measured for Glen Flora itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredGlen Flora runs about 159 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
MeasuredGlen Flora 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 Glen Flora is in
Glen Flora sits in the Northern Lakes and Forests — EPA Level III, inside the wider Northern Forests. That is read at Glen Flora's own centroid rather than borrowed from Rusk County.
What Grows in Glen Flora
Every plant below cleared Glen Flora's own zone 4a and its 159-day season. Each card opens that plant's Wisconsin profile. How we score.
Is it too late to plant in Glen Flora?
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 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 9 — 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 Glen Flora
Closest first, within ~10 miles of Glen Flora. Listing isn't leaking, and distance isn't exposure.
- Edming OilUnderground Storage Tanks · 400 ft
- DON STEVENSUnderground Storage Tanks · 450 ft
- RU-35/04W/20-0065Nitrate · 2000 ft
- ARTISANS INCBrownfields · 2200 ft
- BUTCHS SERVICEUnderground Storage Tanks · 4.0 mi
- RAYS BACK INUnderground Storage Tanks · 4.0 mi
- DUANE SCHNEIDERUnderground Storage Tanks · 4.1 mi
- William Van DoornUnderground Storage Tanks · 4.6 mi
- The Tony Depot IncUnderground Storage Tanks · 4.7 mi
- BOBS AUTOUnderground Storage Tanks · 4.9 mi
- CENTRAL WISCONSIN INSTALLERSUnderground Storage Tanks · 4.9 mi
- Flambeau High SchoolUnderground Storage Tanks · 5.0 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Glen Flora'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 Glen Flora.
Total Sites
65
within ~10 miles of Glen Flora
Risk Level
Moderate
Highest-severity
4 Toxics Release Inventory facilities
Sources Checked
within ~10 miles of Glen Flora
Severity Distribution
within ~10 miles of Glen Flora
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Glen Flora, Toxics Release Inventory runs higher than the national average — 4 sites within ~10 miles of Glen Flora. It's not cause for alarm — it's worth knowing, and there's a sensible way to grow around it.
Toxics Release Inventory: TRI facilities report annual chemical releases to air, water, and land.
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Check your specific parcel in Glen Flora
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 Glen Flora average
Your land is one point inside Glen Flora
Everything above resolves to Glen Flora as a whole — one PHZM band and one 28°F frost record, read across 362 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 Glen Flora Average
Glen Flora Average
- ●USDA Zones 4a, averaged across Glen Flora
- ●One soil character for all of Glen Flora
- ●Frost dates read at Glen Flora's scale: May 3 to Oct 9
YOUR Parcel
- ✓Your exact zone, not Glen Flora's 4a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Glen Flora
Pull a site-specific report for your exact address in Glen Flora, Wisconsin — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Glen Flora averages can't show:
We read public map data around Glen Flora — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Glen Flora average
How we know this about Glen Flora
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 Glen Flora’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 Glen Flora
When does frost risk typically end in Glen Flora?
The last hard freeze (28°F) in Glen Flora 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 Glen Flora?
The first hard freeze (28°F) in Glen Flora typically arrives around Oct 9, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Sep 25, so the watching starts about Sep 9 — about 159 days after the spring freeze cleared.
How long is the growing season in Glen Flora?
Measured between 28°F hard freezes, Glen Flora sees about 159 frost-free days — roughly May 3 through Oct 9, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 24 to Sep 25, about 124 days.
Is the soil safe to grow vegetables in Glen Flora?
The federal record around Glen Flora shows 65 documented sites, mostly Underground Storage Tanks entries (32), the nearest Underground Storage Tanks 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 Glen Flora?
From about Sep 9 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 9 (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 9. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Glen Flora's scale — its 4a band and its 159-day season. Your yard writes its own version of Glen Flora'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 Glen Flora’s own scale
6 of the readings below were taken at Glen Flora's own scale — its own ~159-day season between 28°F freezes, the 362 acres it covers and 65 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Glen Flora's own USDA hardiness band, zones 4aUSDA PHZM 2023
- Glen Flora's own 28°F hard-freeze dates, about May 3 and Oct 9 and the ~159-day span between themNOAA 1991–2020 Climate Normals
- 65 documented contamination sites on the federal record near Glen Flora, the closest Underground Storage Tanks record under a tenth of a mile out from the town centreFederal environmental registers
- Glen Flora's boundary and the 362 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 4a and a ~159-day seasonGrowable Ground crop-matching engine
- The ecoregion at Glen Flora'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 Glen Flora's 362 acres read through its county's SSURGO summaryfrom Rusk County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Rusk 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 Rusk County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Glen Flora's 362 acreswhy one lot differs from the next →
- Which side of Glen Flora you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 362 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 Glen Flora-wide figureread your own land →
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