What Growing Zone Is Illinois?
Finding your growing zone in Illinois is easy with our interactive zone map. Illinois contains multiple growing zones based on different climate conditions throughout the state. To find your specific zone, search by zip code or select your town from the list below.
Search Plants by Zip Code
Whether you're planning a home garden or professional landscaping project, knowing your growing zone in Illinois helps you select plants that will thrive in your local climate. Our zone information is based on the latest 2023 USDA hardiness zone maps. Search for your town in the list below or click to find zone information for a different state.
IL Hardiness Zones
Select your town in IL from the dropdown below to find its individual plant hardiness zone.
Frequently Asked Questions
Have questions about growing zones in Illinois? Check out our FAQ below for quick answers to common questions about USDA hardiness zones and how they affect plant selection in Illinois.
According to the latest USDA hardiness zone maps, Illinois has more than one growing zone. Different areas within Illinois can have different zones based on their climate. To find your specific zone in Illinois, enter your zip code in the search, select your town's name from the menu, or view the state zone map below.
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Our information is current through the latest data from the United States Department of Agriculture (USDA). This data was released in 2023 and is based on weather data from the 1991 - 2020 time period in the United States. The map of Illinois's growing zones below is based on the average annual extreme minimum temperature throughout the state.
Plant based on Illinois's growing zonesIs Illinois not the right state? Find growing zone information for other regions of the United States by selecting a different state from the list below.
Growing Zones By State
PlantGuideOnline.com combines decades of research to provide accurate growing zone information for every state's climate. By combining information from the USDA with data from top sources like the University of Georgia Weather Network, we are able to provide the most accurate and up to date zone information possible.

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Zones by Town
Ready to find the growing zone for your specific town in Illinois? We have zone information for every town in the United States. Begin by selecting your town in the list below.
PlantGuideOnline.com has been providing growing zone information for Illinois based on the latest scientific data since 2011. We combine the latest growing zone information from the United States Department of Agriculture (USDA) with university databases specific to Illinois to give you the most up to date zone information for your individual town. Whether you're an amateur gardener or a professional landscape architect, let us be your guide to the right growing zone information for Illinois's climate.

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Growing Zones for Every State!
Need to find zone information for a state other than Illinois? We have growing zone information for every town and zip code in the entire United States. Select a different state below to begin exploring zone information for other areas.
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