Kirkland, Illinois, sits in USDA hardiness zone 5b — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
A short list that earns its place here — cabbage, cranberry, lavender, and collard greens — with any one site's soil, sun, and drainage making the final cut.
Even in Kirkland, 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 Kirkland 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 Kirkland — soil, climate, flood, and parcel records. How we handle your address.
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Kirkland — the short answer
Kirkland, Illinois: USDA zone 5b, about 194 days between hard freezes, across 795 acres of town.
- USDA zone
- 5b
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 12
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Oct 23
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~194
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Town area
- 795 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 Kirkland's average, not your lot's — a low corner or a tree line moves it. Against Kirkland's 194-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Kirkland
Each reading below is measured for Kirkland itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredKirkland runs about 194 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
MeasuredKirkland 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 Kirkland is in
Kirkland sits in the Central Corn Belt Plains — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Kirkland's own centroid rather than borrowed from DeKalb County.
What Grows in Kirkland
Every plant below cleared Kirkland's own zone 5b and its 194-day season. Each card opens that plant's Illinois profile. How we score.
Is it too late to plant in Kirkland?
Almost never — the real question is what to plant next. Cool-season crops can go in from around Mar 15; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 12 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Oct 23 — 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 Kirkland
Spotted lanternfly documented 29 miles from Kirkland, first recorded 2023. What to watch for.
What's on the federal record near Kirkland
Closest first, within ~10 miles of Kirkland. Listing isn't leaking, and distance isn't exposure.
- Charles F Lee & Sons IncUnderground Storage Tanks · 550 ft
- Blake Oil CoUnderground Storage Tanks · 900 ft
- Kirkland Quick StopUnderground Storage Tanks · 900 ft
- RONS BODY SHOPBrownfields · 900 ft
- KIRKLAND BODY SHOPBrownfields · 950 ft
- GRAPHICS & INDUSTRIAL CIRCUITSToxics Release Inventory · 1200 ft
- GRAPHICS & INDUSTRIAL CIRCUITSBrownfields · 1200 ft
- Hiawatha School Dist #426Underground Storage Tanks · 1900 ft
- EDWARD HINES LUMBER COBrownfields · 1900 ft
- Hines LumberUnderground Storage Tanks · 1900 ft
- Kirkland Village OfUnderground Storage Tanks · 2000 ft
- EUCLID CHEMICAL COToxics Release Inventory · 1.2 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Kirkland'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 Kirkland.
Total Sites
93
within ~10 miles of Kirkland
Risk Level
Elevated
Highest-severity
1 Superfund site (none NPL-listed)
Sources Checked
within ~10 miles of Kirkland
Severity Distribution
within ~10 miles of Kirkland
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Kirkland, two things run higher than the national average within ~10 miles of Kirkland — CAFO (5 sites) and Toxics Release Inventory (9 sites). Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
CAFO: CAFOs pose a different contamination profile than chemical sources.
Toxics Release Inventory: TRI facilities report annual chemical releases to air, water, and land.
Wash all produce consumed raw thoroughly, especially leafy greens grown near CAFOs.
Check prevailing wind direction — downwind parcels face higher exposure than upwind or crosswind locations.
Check your specific parcel in Kirkland
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 Kirkland average
Your land is one point inside Kirkland
Everything above resolves to Kirkland as a whole — one PHZM band and one 28°F frost record, read across 795 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 Kirkland Average
Kirkland Average
- ●USDA Zones 5b, averaged across Kirkland
- ●One soil character for all of Kirkland
- ●Frost dates read at Kirkland's scale: Apr 12 to Oct 23
YOUR Parcel
- ✓Your exact zone, not Kirkland's 5b
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Kirkland
Pull a site-specific report for your exact address in Kirkland, Illinois — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Kirkland averages can't show:
We read public map data around Kirkland — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Kirkland average
How we know this about Kirkland
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 Kirkland’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 Kirkland
When does frost risk typically end in Kirkland?
The last hard freeze (28°F) in Kirkland typically lands around Apr 12, 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 3.
When is the first frost in Kirkland?
The first hard freeze (28°F) in Kirkland typically arrives around Oct 23, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 9, so the watching starts about Sep 23 — about 194 days after the spring freeze cleared.
How long is the growing season in Kirkland?
Measured between 28°F hard freezes, Kirkland sees about 194 frost-free days — roughly Apr 12 through Oct 23, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer May 3 to Oct 9, about 159 days.
Is the soil safe to grow vegetables in Kirkland?
The federal record around Kirkland is a meaningful one — 93 documented sites, mostly Underground Storage Tanks entries (42), the nearest Underground Storage Tanks record about 0.1 miles 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 Kirkland?
From about Sep 23 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 23 (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 23. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Kirkland's scale — its 5b band and its 194-day season. Your yard writes its own version of Kirkland'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 Kirkland’s own scale
7 of the readings below were taken at Kirkland's own scale — its own ~194-day season between 28°F freezes, the 795 acres it covers and 93 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Kirkland's own USDA hardiness band, zones 5bUSDA PHZM 2023
- Kirkland's own 28°F hard-freeze dates, about Apr 12 and Oct 23 and the ~194-day span between themNOAA 1991–2020 Climate Normals
- 93 documented contamination sites on the federal record near Kirkland, the closest Underground Storage Tanks record about 0.1 miles out from the town centreFederal environmental registers
- Kirkland's boundary and the 795 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 5b and a ~194-day seasonGrowable Ground crop-matching engine
- The ecoregion at Kirkland's own centroid, the Central Corn Belt PlainsUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Kirklandlydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Kirkland's 795 acres read through its county's SSURGO summaryfrom DeKalb County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom DeKalb 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 DeKalb County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Kirkland's 795 acreswhy one lot differs from the next →
- Which side of Kirkland you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 795 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.1 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 Kirkland-wide figureread your own land →
More in Illinois
Wider growing context
What grows across IllinoisKirkland sits outside our named growing regions, so Illinois as a whole is its closest context here.
Nearby growing guides