Texas FFA Nursery Landscape Practice Exam

Which organization is responsible for establishing the Plant Hardiness Zone map?

1. Environmental Protection Agency

2. United States Department of Agriculture

3. National Oceanic and Atmospheric Administration

4. American Horticultural Society

The correct answer is: United States Department of Agriculture

The United States Department of Agriculture (USDA) is responsible for establishing the Plant Hardiness Zone map, which provides gardeners and growers with crucial information about the climatic conditions in various regions of the United States. This map helps determine which plants are most likely to thrive in specific areas based on average annual minimum temperatures. The USDA developed this tool to assist in plant selection and to promote successful gardening and landscaping practices. By using this map, individuals can avoid planting species that may not be suited for their local climate, thereby increasing the chances of plant survival and prosperity. The other organizations listed have different scopes and missions. For instance, the Environmental Protection Agency primarily focuses on environmental protection and regulation, while the National Oceanic and Atmospheric Administration deals with weather and climate data. The American Horticultural Society provides resources and support for gardening enthusiasts but does not create the Plant Hardiness Zone map.