Plant climate zones in Arizona are based on expected minimum temperatures throughout the southwest. It shows five different zones, each of which represents an area of winter hardiness for certain ornamental plants. These five plant climate zones give adequate information for most horticultural purposes. For more detailed information about climate zones and their relationship to plants and gardening, you may wish to visit the Extension office in your county. This information is specific for Arizona or certain USDA hardiness zones and may not apply to your local conditions. For more information on this topic, choose a related topic link above, submit a questions through Ask an Expert, or contact your local county Extension office.
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