To determine your hardiness zone, you can use the USDA Plant Hardiness Zone Map. The map is based on the average annual minimum winter temperature, divided into 10-degree F zones and further divided into 5-degree F half-zones. You can locate where you live on the map to find your hardiness zone. Additionally, there are lists available online that provide hardiness zones for specific cities and counties in each state, such as New York. Understanding your hardiness zone is important for selecting plants that are appropriate for your area and ensuring the success of your garden.