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Printer Friendly Version. Understanding the USDA planting zones you live in can mean the difference between success and failure in your garden. Planting plants, vegetables and flowers that are appropriate for your US growing zone will make sure that your garden is happy and healthy year after year.
Suggested hardiness zones have been indicated for all trees and perennials available online from the Foundation. If a range of zones, for example, zones 4-9, is indicated, the tree or perennial is known to be hardy in zones 4, 5, 6, 7, 8, and 9. Suitable hardiness means a plant can be expected to grow in the zone's temperature extremes, as determined by the lowest average annual temperature.