The American Horticultural Society (AHS), founded in 1922, is an educational, non-profit, 501(c)(3) organization that recognizes and promotes excellence in American horticulture. It is one of the oldest and most prestigious gardening organizations in the United States whose mission is to educate and inspire people of all ages to become successful and environmentally responsible gardeners by advancing the art and science of horticulture. AHS is known for its educational programs and the dissemination of horticultural information.

AHS' headquarters is located at River Farm, one of George Washington's original five farms, in Alexandria, VA. River Farm is 25 acres located on the Potomac River, containing beautiful gardens as well as a wide variety of wildlife. However, River Farm is much more than a beautiful landscape -- it serves as the Society's showcase for its national programs and policies.