To determine your growing zone, you can use the USDA Plant Hardiness Zone Map. This map allows gardeners and growers to determine which plants are most likely to thrive at a location based on the average annual minimum winter temperature. The map divides the United States into 13 zones, each with a 10-degree Fahrenheit difference in the average annual minimum temperature. The higher the zone number, the warmer the climate. To find your zone, you can locate where you live on the map. You can also enter your zip code on websites like Grow Organic to find your growing zone. Understanding your growing zone is important because it helps you choose plants that are appropriate for your climate and will thrive in your garden.