what plant zone am i in

To determine your plant zone, you can use the USDA Plant Hardiness Zone Map. This map divides North America into 11 separate planting zones based on their average, annual minimum temperature during a 30-year period. Each zone differs by 10 degrees Fahrenheit and is further divided into two sub-zones that differ by 5 degrees Fahrenheit. The colder half of the sub-zone is indicated by the letter ‘a’ and the warmer half indicated by the letter ‘b’ . To find your zone, you can locate where you live on the map provided by the USDA. Additionally, some states have their own hardiness zone maps, such as Wisconsin, which has three cold hardiness zones.