Know Where You Grow: Hardiness Zones and Frost Dates (Update)
In November 2023, the USDA released updated plant hardiness zones. The new map shows that many areas have become warmer in the past decade, with some areas moving up one or two zones. The hardiness map for Illinois. Left side: 2012. Right side: 2023. When starting a garden, understanding the growing climate in your area is an important first step. There are two key pieces of information to know about your local growing climate: your hardiness zone and frost dates....