A hardiness zone is a geographic area defined as having a certain average annual minimum temperature, a factor relevant to the survival of many plants. Plantingzones are areas you can find on a growing zone map that show exactly which plants are best suited to thrive in your given area, or zone. Growing zones are important to know what plants will be perennials in your zone, especially when you are choosing what fruit trees to plant. Jump To SectionHow to Use Hardiness Zones When Planting a Garden13 Plant Hardiness Zones Rely on state maps for the USDA Hardiness Zones for planting to select plants suited to your location and climate. USDA zones 2 and 3 are some of the coldest climates out there, but gardening is possible.Learn About Cold Weather PlantsForZones 2-3. Mary H. Dyer's avatar. Plantingzones or growing zones are illustrated on a map known as the USDA Plant Hardiness Zone Map. Discover Your PlantingZone. Plantingzones provide an assessment of what plants are best suited for growing in a particular region. They can give you more information about what plants... Difference Between PlantingZones. Separated by 10-degree differences, hardiness zones run from the lowest to the highest possible cold conditions. A map showing planting hardiness zones for a central region of the United States using color codes and temperature ranges. Plantingzones are geographic areas defined by specific temperature parameters that help determine plant survival prospects. These zones serve as a standardized system to assess which... Choosing Fast Growing Trees For Your Landscaping. Your first order of business is to decide what nursery plants you can choose from to develop the look you want for your yard quickly. A broadband internet connection is recommended for the interactive GIS-based map above. To find the Plant Hardiness Zone at your location quickly... How PlantingZones (Growing Zones) Work. The USDA Plant Hardiness Zone Map (below) is a color-coded map that divides the U.S. into zones based on average low temperatures.