Boulder Hill's Hardiness Zone

Our records indicate the United States Department of Agriculture has given Boulder Hill a growing zone designation of 5b. Sometimes also called the planting zone or hardiness zone, this zone number gives you an idea of what plants can and cannot grow in Boulder Hill's climate. If you are looking for plants suitable for growing in the Boulder Hill area, head on over to our page on plants that grow well in Boulder Hill, IL.

Raised Garden Planter

Elevated planter for easy access and better drainage.

Large Greenhouse Kit

Spacious greenhouse for extending your growing season.

Small Greenhouse Kit

Compact greenhouse perfect for small spaces.

Rustic Iron Garden Trellis

Sturdy trellis for supporting climbing plants and vines.

Hoeing Ain't Easy Garden Sign

Fun and decorative garden sign to add personality to your space.

Understanding your growing zone is very important because it is a measure of the lowest temperature that a plant can survive, helping you to decide what plants would grow best in your particular climate. Since Boulder Hill is in growing zone 5b this means that plants there can survive temperatures as low as 10 to 15 degrees Fahrenheit. Plants chosen for Boulder Hill's climate should be chosen with this in mind or plants should be moved inside to keep their core temperature in the right range if necessary.

USDA Growing Zone: 5b

Zip Codes: 60538

Longitude: -88.3353

Latitude: 41.7113

Lowest Avg Temperatures (F): -15 to -10