NATIONAL CAPITAL AREA FEDERATION OF GARDEN CLUBS, INC
http://www.gardencentral.org/ncafgc
A member of the National Council of State Garden Clubs, Inc., encompasses four districts, 108 garden clubs, and approximately 3600 members within the metropolitan Washington, DC area and 28 plant societies and other affiliates.

NATIONAL GARDEN CLUBS
http://www.gardenclub.org
A not-for-profit educational organization with its headquarters in St. Louis, Missouri. It is composed of 50 State Garden Clubs and the National Capital Area, 7,183 member garden clubs and 221,943 members. In addition, NGC proudly recognizes 447 International Affiliates as well as 49 National Affiliates within the United States.

THE GARDEN CLUB OF AMERICA
http://www.gcamerica.org
The purpose of The Garden Club of America is to stimulate the knowledge and love of gardening, to share the advantages of association by means of educational meetings, conferences, correspondence and publications, and to restore, improve, and protect the quality of the environment through educational programs and action in the fields of conservation and civic improvement.

THE GARDENERS OF AMERICA/MEN’S GARDEN CLUBS OF AMERICA
http://www.tgoa-mgca.org
A national organization with over 4,800 members in local clubs all around the USA. These members and clubs put great emphasis on gardening education and community beautification.