Country Club Hills, Illinois, sits in USDA hardiness zone 6a — a band that supports both cool-season staples and warm-season crops chosen to fit the local frost window.
Reliable performers under these conditions include cabbage, hazelnut, lavender, and collard greens; what your own ground favors still comes down to its soil, sun, and drainage.
Even in Country Club Hills, 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 Country Club Hills 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 Country Club Hills — soil, climate, flood, and parcel records. How we handle your address.
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Country Club Hills — the short answer
Country Club Hills, Illinois: USDA zone 6a, about 217 days between hard freezes, across 3K acres of city.
- USDA zone
- 6a
- USDA PHZM 2023
- Last hard freeze (28°F)
- Apr 4
- NOAA 1991–2020 Climate Normals, 28°F — this town
- First hard freeze (28°F)
- Nov 7
- NOAA 1991–2020 Climate Normals, 28°F — this town
- Days between freezes
- ~217
- 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 6a is Country Club Hills's average, not your lot's — a low corner or a tree line moves it. Against Country Club Hills's 217-day season, see what your own ground reads.
Soil varies lot by lot — soil types explained.
What this means for growing in Country Club Hills
Each reading below is measured for Country Club Hills itself — here is what it means for a garden here, and the move an experienced grower makes about it.
Season length
MeasuredCountry Club Hills runs about 217 days between hard freezes — a long growing season.
There is slack for succession plantings and slow-finishing crops: many vegetables can be sown twice, and the heat-lovers have time to ripen fully.
Plan a second sowing of quick crops after the first comes out, and use the fall window most gardeners let sit idle.
NOAA 1991–2020 Climate Normals
Winter hardiness
MeasuredCountry Club Hills sits in USDA hardiness zone 6a.
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 Country Club Hills is in
Country Club Hills sits in the Central Corn Belt Plains — EPA Level III, inside the wider Eastern Temperate Forests. That is read at Country Club Hills's own centroid rather than borrowed from Cook County.
What Grows in Country Club Hills
Every plant below cleared Country Club Hills's own zone 6a and its 217-day season. Each card opens that plant's Illinois profile. How we score.
Is it too late to plant in Country Club Hills?
Rarely: the season closes in stages, not all at once, and each stage has its crops. Cool-season crops can go in from around Mar 7; tender transplants wait until two to three weeks after the last 28°F hard freeze, which lands near Apr 4 (NOAA 1991–2020 climate normals); and from midsummer, planting counts back from the first fall freeze around Nov 7 — long-season crops need about 90 days of runway, quick greens only 30. Here the season winds down slowly: late sowings, a real autumn harvest, and garlic in the ground before the first hard freeze.
Documented around Country Club Hills
Spotted lanternfly documented 9 miles from Country Club Hills, first recorded 2023. What to watch for.
What's on the federal record near Country Club Hills
Closest first, within ~10 miles of Country Club Hills. Listing isn't leaking, and distance isn't exposure.
- Fuel StarUnderground Storage Tanks · 0.6 mi
- Harvey's CornerUnderground Storage Tanks · 0.6 mi
- NATIONAL CLEANERSBrownfields · 0.7 mi
- Country Club Hills GasUnderground Storage Tanks · 0.7 mi
- Global Gas USA, Inc.Underground Storage Tanks · 0.7 mi
- HAZEL CREST PLAZA CLEANERSBrownfields · 0.8 mi
- HILCREST HIGH SCHOOLBrownfields · 0.8 mi
- Pumping StationUnderground Storage Tanks · 0.8 mi
- COUNTRY CLUB HILLSPFAS · 0.8 mi
- Better Built Lumber & SupplyUnderground Storage Tanks · 0.9 mi
- SOUTHWOOD MIDDLE SCHOOLBrownfields · 1.0 mi
- Forest Lumber CoUnderground Storage Tanks · 1.0 mi
6 more sites are on the record inside the same radius. See them on the map
Measured from Country Club Hills'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 Country Club Hills.
Total Sites
2,666
within ~10 miles of Country Club Hills
Risk Level
High
Highest-severity
51 Superfund sites (none NPL-listed)
Sources Checked
within ~10 miles of Country Club Hills
Severity Distribution
within ~10 miles of Country Club Hills
Highest-Severity Sites
A note from Gnorman
What an experienced grower watches for around here
In and around Country Club Hills, two things run higher than the national average within ~10 miles of Country Club Hills — PFAS (37 sites) and Superfund (51 sites). Knowing it is half the work — and it's nothing a thoughtful grower can't plan for.
PFAS: PFAS (per- and polyfluoroalkyl substances) are called "forever chemicals" because they do not biodegrade.
Superfund: Superfund sites represent the most severe contamination in the federal system.
Test irrigation water source — this is the primary pathway for PFAS to reach garden crops.
Commission professional soil testing before any food production (test for heavy metals, VOCs, and SVOCs).
Check your specific parcel in Country Club Hills
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 Country Club Hills average
Your land is one point inside Country Club Hills
Everything above resolves to Country Club Hills 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 Country Club Hills Average
Country Club Hills Average
- ●USDA Zones 6a, averaged across Country Club Hills
- ●One soil character for all of Country Club Hills
- ●Frost dates read at Country Club Hills's scale: Apr 4 to Nov 7
YOUR Parcel
- ✓Your exact zone, not Country Club Hills's 6a
- ✓Your SSURGO soil type & pH
- ✓Your sun exposure, cast in 3D
See MY Growing Report
Read your specific parcel in Country Club Hills
Pull a site-specific report for your exact address in Country Club Hills, Illinois — soil, sun, drainage, frost risk, and scored plant recommendations.
Three things about your lot that Country Club Hills averages can't show:
We read public map data around Country Club Hills — soil, climate, flood, and parcel records. How we handle your address.
25+ data sources read at your address, not the Country Club Hills average
How we know this about Country Club Hills
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 Country Club Hills’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 Country Club Hills
When does frost risk typically end in Country Club Hills?
The last hard freeze (28°F) in Country Club Hills typically lands around Apr 4, 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 Apr 25.
When is the first frost in Country Club Hills?
The first hard freeze (28°F) in Country Club Hills typically arrives around Nov 7, per NOAA 1991–2020 climate normals — the point tender summer crops finish. Lighter frosts run ahead of it, near Oct 24, so the watching starts about Oct 8 — about 217 days after the spring freeze cleared.
How long is the growing season in Country Club Hills?
Measured between 28°F hard freezes, Country Club Hills sees about 217 frost-free days — roughly Apr 4 through Nov 7, per NOAA 1991–2020 climate normals. Tender crops work a shorter one: nearer Apr 25 to Oct 24, about 182 days.
Is the soil safe to grow vegetables in Country Club Hills?
The federal record around Country Club Hills runs heavier than most — 2,666 documented sites, mostly Underground Storage Tanks entries (1,361), the nearest Underground Storage Tanks record about 0.6 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 Country Club Hills?
From about Oct 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 Nov 7 (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 Nov 7. Hardy greens and roots shrug off light frost and sweeten after it — leave them in.
Everything above is measured at Country Club Hills's scale — its 6a band and its 217-day season. Your yard writes its own version of Country Club Hills'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 Country Club Hills’s own scale
7 of the readings below were taken at Country Club Hills's own scale — its own ~217-day season between 28°F freezes, the 3,181 acres it covers and 2,666 documented sites around it; 4 are borrowed from a wider read, named and linked below.
Measured here
- Country Club Hills's own USDA hardiness band, zones 6aUSDA PHZM 2023
- Country Club Hills's own 28°F hard-freeze dates, about Apr 4 and Nov 7 and the ~217-day span between themNOAA 1991–2020 Climate Normals
- 2,666 documented contamination sites on the federal record near Country Club Hills, the closest Underground Storage Tanks record about 0.6 miles out from the town centreFederal environmental registers
- Country Club Hills's boundary and the 3,181 acres inside itUS Census TIGER/Line 2025
- Which of 1,086 plants clear zones 6a and a ~217-day seasonGrowable Ground crop-matching engine
- The ecoregion at Country Club Hills's own centroid, the Central Corn Belt PlainsUS EPA Level III Ecoregions
- A documented spotted-lanternfly record within reach of Country Club Hillslydemapr (De Bona & Helmus), 10 km survey lattice
Inherited from a wider read
- Soil character — no town-scale survey exists, so Country Club Hills's 3,181 acres read through its county's SSURGO summaryfrom Cook County
- Growing-degree days and winter chill — measured county-wide only, so the county page carries themfrom Cook 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 Cook County
What this page can’t tell you
- The soil pH, drainage, sun hours, and frost pockets on any one lot among Country Club Hills's 3,181 acreswhy one lot differs from the next →
- Which side of Country Club Hills you're on — a low spot frosts first and a south wall warms early, and one normal is being asked to speak for all 3,181 acresreading your own microclimate →
- How close that record sits to YOUR lot — the closest Underground Storage Tanks record about 0.6 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 Country Club Hills-wide figureread your own land →