African Violet Society of America
Presenting information about growing, showing and propagating African violets and other gesnariads.
American Association of Amateur Arborists
A loose association of individuals and groups who are interested in learning more about trees and other woody plants
American Association of Botanical Gardens and Arboreta
Supporting the public horticulture community in its mission to study, display, and conserve plants.
American Horticultural Society
The AHS mission is to educate and inspire people to become successful and environmentally responsible gardeners by advancing the art and science of horticulture.
American Society of Landscape Architects
Founded in 1899, the society has twelve thousand members. Includes a buyers guide on landscape information.
Cycad Society
Education and conservation of Cycads, rare and unusual gymnosperm plants. Quarterly newsletter and a seed bank available to members.
Heartland Peony Society
Educational information on peonies and specific information on the society in the US midwest.
Holly Society of America
Provides an information exchange through scientific studies, publications, lectures, meetings, and visiting holly collections.
National Garden Clubs
Provides education, resources and national networking opportunities for its members to promote gardening and floral design. Includes calendar of events, educational opportunities a…
National Gardening Association
A non-profit organization offering National Gardening Magazine, educational and youth programs, gardening products, books, research, online content and showcases, and a gardeners b…
National Home Gardening Club
Member-oriented site for this United States gardeners' club, providing access to bulletin boards, members' photos, articles from the magazine, and member benefits.
Northern Gardener
Home to Northern Gardener Magazine and the Minnesota State Horticultural Society. Features gardening articles, advice, tips, calendar, and resources.
Oasis Botanical Sanctuary
Uses scientific research to educate the public on the proper methods of ecological development.
The Gardeners of America/Men's Garden Clubs of America (TGOA/MGCA)
Organization with local chapters around the USA, focusing on gardening education and community gardening initiatives. Information about membership, clubs, and events.
The New England Botanical Club
Promotes the study of the plants of North America, especially the flora of New England and adjacent areas.