The United States National Arboretum is a research and education facility of the United States Department of Agriculture (USDA). It is located in Northeast Washington, D.C. and is open to the public. The National Arboretum was established in 1927 with the mission of conducting research and education in plant science and horticulture.
The National Arboretum is home to a wide range of collections of trees, shrubs, and other plants, including collections of azaleas, bonsai, conifers, and roses. It also has a research facility that focuses on plant breeding and genetics, and a library that contains a collection of books and other resources on plant science and horticulture.
In addition to its research and educational programs, the National Arboretum is also a popular tourist destination. It has over 446 acres of gardens, lawns, and wooded areas, and is a great place to relax and enjoy nature. The National Arboretum is open to the public every day except December 25.