Winfield, Illinois, sits in USDA hardiness zone 5b — a range where zone-matched perennials and frost-aware annual timing set what succeeds.
Reliable performers under these conditions include cabbage, cranberry, lavender, and collard greens; what your own ground favors still comes down to its soil, sun, and drainage.
Even in Winfield, 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 Winfield 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 Winfield — soil, climate, flood, and parcel records. How we handle your address.
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Winfield — the short answer
Winfield, Illinois: USDA zone 5b, about 197 days between hard freezes, across 2K acres of town.
- USDA zone
- 5b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 11
- 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
- ~197
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 2K 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 5b is Winfield's average, not your lot's — a low corner or a tree line moves it. Against Winfield's 197-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Winfield
Each reading below is measured for Winfield itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredWinfield runs about 197 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
MeasuredWinfield sits in USDA hardiness zone 5b.
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 Winfield is in
Winfield sits in the Central Corn Belt Plains — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Winfield's own centroid rather than borrowed from DuPage County.
What Grows in Winfield
Every plant below cleared Winfield's own zone 5b and its 197-day season. Each card opens that plant's Illinois profile. How we score.
Is it too late to plant in Winfield?
For most of the year, no — what changes is which crops still fit the days remaining. Cool-season crops can go in from around Mar 14; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 11 (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. Even past midsummer there is room for a true fall garden here, and garlic planted near the close carries the momentum into next year.
Documented around Winfield
Spotted lanternfly documented 6 miles from Winfield, first recorded 2023. What to watch for.
What's on the federal record near Winfield
Closest first, within ~10 miles of Winfield. Listing isn't leaking, and distance isn't exposure.
- Maria Petroleum, Inc. d/b/a Winfield & Beecher ShellUnderground Storage Tanks · 1700 ft
- CENTRAL DUPAGE HOSPITALBrownfields · 1800 ft
- WINFIELDPFAS · 1900 ft
- Central DuPage HospitalUnderground Storage Tanks · 2500 ft
- Winfield Service StationUnderground Storage Tanks · 0.6 mi
- Saint Johns Catholic ChurchUnderground Storage Tanks · 0.6 mi
- Winfield Fuel & Material Co.Underground Storage Tanks · 0.6 mi
- WINFIELD FIRE DEPTBrownfields · 0.7 mi
- ELMHURST MEMORIAL INFUSION CTRBrownfields · 0.7 mi
- ALPHA CLEANERSBrownfields · 0.7 mi
- THERMO COUPLE PRODUCTS COBrownfields · 0.8 mi
- DUPAGE COUNTY POWER PLANTBrownfields · 0.8 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Winfield'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 Winfield.
Sources Checked
within ~10 miles of Winfield
Severity Distribution
within ~10 miles of Winfield
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Winfield, Toxics Release Inventory runs higher than the national average — 294 sites within ~10 miles of Winfield. Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
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 Winfield
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 Winfield average
Your land is one point inside Winfield
Everything above resolves to Winfield as a whole — one PHZM band and one 28°F frost record, read across 2K 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 Winfield Average
Winfield Average
- ●USDA Zones 5b, averaged across Winfield
- ●One soil character for all of Winfield
- ●Frost dates read at Winfield's scale: Apr 11 to Oct 25
YOUR Parcel
- ✓Your exact zone, not Winfield's 5b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Winfield
Pull a site-specific report for your exact address in Winfield, Illinois — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Winfield averages can't show:
We read public map data around Winfield — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Winfield average
How we know this about Winfield
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 Winfield’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 Winfield
When does frost risk typically end in Winfield?
The last hard freeze (28°F) in Winfield typically lands around Apr 11, 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 2.
When is the first frost in Winfield?
The first hard freeze (28°F) in Winfield 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 197 days after the spring freeze cleared.
How long is the growing season in Winfield?
Measured between 28°F hard freezes, Winfield sees about 197 frost-free days — roughly Apr 11 through Oct 25, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 2 to Oct 11, about 162 days.
Is the soil safe to grow vegetables in Winfield?
The federal record around Winfield runs heavier than most — 3,249 documented sites, mostly Underground Storage Tanks entries (1,415), the nearest Underground Storage Tanks record about 0.3 miles out — so test the soil before planting food in the ground, and raised beds with clean imported soil grow well in the meantime. Even here, proximity to a documented site is information, not a diagnosis of any one yard; the contamination map shows exactly what's recorded and where.
How do I protect my plants from frost in Winfield?
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 Winfield's scale — its 5b band and its 197-day season. Your yard writes its own version of Winfield'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 Winfield’s own scale
7 of the readings below were taken at Winfield's own scale — its own ~197-day season between 28°F freezes, the 1,981 acres it covers and 3,249 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Winfield's own USDA hardiness band, zones 5bUSDA PHZM 2023
- Winfield's own 28°F hard-freeze dates, about Apr 11 and Oct 25 and the ~197-day span between themNOAA 1991–2020 Climate Normals
- 3,249 documented contamination sites on the federal record near Winfield, the closest Underground Storage Tanks record about 0.3 miles out from the town centreFederal environmental registers
- Winfield's boundary and the 1,981 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 5b and a ~197-day seasonGrowable Ground crop-matching engine
- The ecoregion at Winfield's own centroid, the Central Corn Belt PlainsUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Winfieldlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Winfield's 1,981 acres read through its county's SSURGO summaryfrom DuPage County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom DuPage County
- The growing challenges every Illinois grower plans around — written at state scale, so they stay on the state guidefrom Illinois
- Butterfly and beetle records, and the farmland pesticide estimate — all published county-widefrom DuPage County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Winfield's 1,981 acreswhy one lot differs from the next →
- Which side of Winfield you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 1,981 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.3 miles 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 Winfield-wide figureread your own land →
More in Illinois
Wider growing context
What grows across IllinoisWinfield sits outside our named growing regions, so Illinois as a whole is its closest context here.
Nearby growing guides