Get Agriculture Usda Zone Map Images. Since the us department of agriculture issued its first usda plant hardiness zone map in 1960, it has been the standard for gardeners, landscapers, and plant nurseries. But state, regional, and national images of the map can be downloaded and printed in a variety of sizes and resolutions.
Hardiness zones were determined by the united states department of agriculture (usda) to help gardeners and growers determine which plants are most likely to thrive in a particular location.
It is used by the agriculture industry to define what plants grow best in what areas. Spring shipping schedule and zone opening dates. Hardiness zones were determined by the united states department of agriculture (usda) to help gardeners and growers determine which plants are most likely to thrive in a particular location. Department of agriculture (usda) agricultural research service (ars) and is available on their website.