Soil Types in Cook County, Illinois
Cook County has 165 zip codes in our database. Explore the soil types, hardiness zones, and gardening tips for this county.
Maps show what is typical for Cook County, Illinois. A home test kit tells you the pH and nutrient levels of your yard.As an Amazon Associate, we earn from qualifying purchases.
Get a soil test kit →Soil Type Distribution
Test before you amend
Our data is drawn from USDA soil surveys, so it describes the dominant soil across an area — useful for planning, not precise enough for dosing lime or fertiliser. Before you buy amendments for Cook County, Illinois, run a test on the bed you actually garden: pH and N-P-K vary from one end of a yard to the other.
Get a soil test kit for Cook County, Illinois →As an Amazon Associate, we earn from qualifying purchases.
Hardiness Zones
Cook County spans USDA zones 5b through 6b.
Top Cities in Cook County
Soil Types in Cook County
Cook County in Illinois has 165 zip codes in our database. The most common soil type is Clay Loam, found in 100% of the county. Understanding your local soil helps you choose the right plants and amendments for your garden.
Hardiness Zones in Cook County
Cook County spans USDA hardiness zones 5b through 6b. Your hardiness zone determines which perennial plants will survive winter in your area. Enter your zip code above to find your exact zone and get personalized planting recommendations.