Gardening & Landscaping Associations and Societies: Associations and Societies offer a variety of services including plant education, how to grow a native garden plant, the links between plants, gardening, food, and health and also information about flowers and public gardens.

American Society of Landscape Architects (ASLA)
American Society of Landscape Architects 636 Eye Street, NW Washington, DC 20001-3736 Phone: 202-898-2444 Toll-free Number: 888-999-ASLA (2752) Fax: 202-898-1185
http://www.asla.org/
APLD: Association of Professional Landscape Designers
Association of Professional Landscape Designers 4305 North Sixth Street, Suite A Harrisburg, PA 17110 Phone: 717.238.9780 Fax: 717.238.9985
http://www.apld.com/education/for_students.asp
International Society of Arboriculture: Mid-Atlantic Chapter
The Mid-Atlantic Chapter International Society of Arborists (MAC-ISA) PO Box 1200 Haymarket, VA 20168 Phone: (703)753.0499 Fax: (703)753-0869
http://www.mac-isa.org/
Lady Bird Johnson Wildflower Center
Lady Bird Johnson Wildflower Center 4801 La Crosse Avenue Austin, Texas 78739 Information: (512) 232-0100 Administration: (512) 232-0200 Fax: (512) 232-0156 Gift Store: (512) 232-0131
http://www.wildflower.org/
National Gardening Association::Garden Resources
National Gardening Association 1100 Dorset Street South Burlington, VT 05403 Phone: (802) 863-5251 Fax: (802) 864-6889
http://www.garden.org/home
The Nature Conservancy The Global Invasive Species Team
Invasive non-native plants pose one of the most serious threats to the protection of biological diversity worldwide, and the introduction and spread of these adventive species continue, in many cases,
http://tncweeds.ucdavis.edu/horticulture.html
Virginia Nursery & Landscape Association
Virginia Nursery & Landscape Association 383 Coal Hollow Rd Christiansburg, VA 24073-6721 Phone: 540-382-0943 or Toll Free: 800-476-0055 Fax: 540-382-2716
http://www.vnla.org/
Virginia Society of Landscape Designers - Professional Landscape and Garden Design in Virginia
Virginia Society of Landscape Designers c/o Jane Abbott 16 Willway Avenue Richmond, VA 23226 Phone: (804) 355-5211
Virginia Society of Landscape Designers - Professional Landscape and Garden Desi...