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Printer Friendly Version. Understanding the USDA planting zones you live in can mean the difference between success and failure in your garden. Planting plants, vegetables and flowers that are appropriate for your US growing zone will make sure that your garden is happy and healthy year after year.
This not only provides hardiness zones for all states, but will also tell you what garden zone is Illinois. The map provided here is for the Illinois hardiness planting zone, which should help determine the most ideal plants for your area. Illinois growing zones range from zones 5-7.