"Deep South Region of National Garden Clubs, Inc." - "Information about Federated Garden Clubs and their projects in the states of Alabama, Florida, Georgia, Louisiana, Mississippi and Tennessee."

"National Capital Area Federation of Garden Clubs, Inc." - "Washington-area chapter of the National Garden Clubs, representing over a hundred area clubs. Provides membership information, news, event calendar, and links to local gardening groups and affiliates."

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 Bamboo Society - "Offers information about bamboo including a species source list, a list of international bamboo societies, information on climate anc growing zones."

American Conifer Society - Information on the more than five hundred species of conifers distributed around the world.

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 Public Gardens Association - "Supporting the public horticulture community in its mission to study, display, and conserve plants."

American Society of Landscape Architects - "Founded in 1899, the society has twelve thousand members. Includes a buyers guide on landscape information."

Arizona Native Plant Society - "Organization with "chapters" in different communities of Arizona. Contains information about what the group does, what they hope to achieve and a helpful but concise "Plant Salvage" section."

Colorado Native Plant Society - "Information about membership, programs, local chapters, newsletters, and photos."

Connecticut Botanical Society - "Group for anyone interested in Connecticut's plants - detailed information about what the society does, pricing and contact details; wildflower photo galleries; gardening with native plants."

Cycad Society - "Education and conservation of Cycads, rare and unusual gymnosperm plants. Quarterly newsletter and a seed bank available to members."

Florida Native Plant Society - "Promotes the preservation, conservation, and restoration of the native plants and native plant communities of Florida."

Gardening Organizations and Associations - "Information on events, newsletter, tips, children's projects, and gardening information."

Georgia Botanical Society - "Dedicated to the study and preservation of Georgia's wild, native, and endangered wildflowers and plant life. Information about newsletter and journal, field trips, and several online articles."

Georgia Native Plant Society - "Promotes the conservation of native plants and habitats of Georgia, USA. Information about the society, native plants, events and resources."

Georgia Plant Conservation Alliance - "Dedicated to the study and preservation of Georgia's flora through research, education, and advocacy."

Hardy Plant Society Mid Atlantic Group - Gardening society centered around the Philadelphia area. Brief information and membership signup form.

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."

Idaho Native Plant Society - A non-profit organization dedicated to promoting interest in native plants and plant communities of the state. Includes list of plants of conservation concern in Idaho.

Illinois Native Plant Society - "For professionals and amateurs who share an interest in all aspects of the flora native to the state. Information on chapters, publications, invasive plants, nurseries and seeds, membership, and contacts are featured."

Indiana Native Plant and Wildflower Society - "Promoting the appreciation, conservation, beauty, diversity and environmental importance of indigenous vegetation."

Iowa Native Plant Society - "Dedicated to preserving and promoting Iowa's native flowers, grasses, sedges, shrubs, and trees. Information about membership, excursions, newsletters, and a photo gallery."

Iowa Prairie Network - "An organization that sponsors events in the Iowa area - offers information about the events, contact details and links to related sites."

Kentucky Native Plant Society - Information from this group interested in the native plants and wildflowers of Kentucky.

Lady Bird Johnson Wildflower Center - "Dedicated to educating people about the environmental necessity, economic value, and natural beauty of native plants."

Louisiana Native Plant Society - "Statewide non-profit organization presents membership information, calendar of field trips and events, newsletters, and scientific references."

Maryland Native Plant Society - "Dedicated to protecting, conserving, and restoring Maryland's native plants and habitats. Includes meetings, field trips, restoration projects, and a list of native plant suppliers."

Michigan Botanical Club - Consists of five chapters and is the native plant society for the State of Michigan.

Mid South Hosta Society - Gardening club devoted to hostas.

Minnesota Native Plant Society - "Brief information about what the society does, where they are, and how to join."

Missouri Native Plant Society - "Information on area chapters, photo gallery, articles from publications, and membership materials."

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 and image galleries."

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 buying guide."

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."

Native Plant Society of New Jersey - Encouranging an appreciation of native flora and preserving it for future generations to enjoy.

Native Plant Society of Northeastern Ohio - A chapter of The Ohio Native Plant Society.

Native Plant Society of Oregon - "Details membership, bulletins, their own email discussion list and the officers of each chapter in the Society."

Nevada Native Plant Society - "Non-profit organization presents its newsletter, field trips and programs, publications, and a plant photo gallery."

New England Gardeners - Discussion group and forum with a New England focus.

New England Wild Flower Society - "The NEWFS is the oldest plant conservation organization in the United States. Promoting conservation of temperate North American plants through education, horticulture, research, habitat preservation, and conservation advocacy."

Northern Gardener - "Home to Northern Gardener Magazine and the Minnesota State Horticultural Society. Features gardening articles, advice, tips, calendar, and resources."

Northern Plains Botanic Garden Society - "Working to establish a botanic garden, conservatory, and arboretum in the Fargo, North Dakota and Moorhead, Minnesota area."

Oasis Botanical Sanctuary - Uses scientific research to educate the public on the proper methods of ecological development.

Ohio Prairie Association - "Encourages the study and conservation of Ohio prairies. Information about the conference and workshops, publications, and membership. Site offers FAQ, maps, and a plant listing."

Pennsylvania Native Plant Society - People interested in identifing and conserving native plants of Pennsylvania.

Pioneer Valley Water Garden and Koi Club - "Club for Western Massachusetts and Northern Connecticut provides listing of club officers, meeting schedule, pond tour photos, and a membership application."

PlantNative - Oregon organization dedicated to moving native plants and naturescaping into mainstream landscaping practices. Includes how-to information and directory of resources.

South Carolina Native Plant Society - Non-profit organization committed to the preservation and protection of native plant communities in South Carolina.

The Ecological Landscaping Association - "Advocates environmentally responsible landscaping and horticultural practices by professionals and the public. Information about events, newsletter, and membership."

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 Gesneriad Society - "Offers culture information, membership benefits, resources, photos and flower show and sales schedules."

The New England Botanical Club - "Promotes the study of the plants of North America, especially the flora of New England and adjacent areas."

The North Carolina Native Plant Society - "Promotes the enjoyment and conservation of native plants and their habitats through education, protection, and propagation. Articles, recommendations, sources, and information about membership."

The Northwest Horticultural Society - "Organization for gardeners and plant lovers in the Pacific Northwest. Event calendar, membership information, articles, and newsletter."

Utah Native Plant Society - "Dedicated to the appreciation, preservation and conservation of the native plants and plant communities found in the state."

Virginia Native Plant Society - Purpose is to further appreciation and conservation of Virginia's native plants and habitats.

Washington Native Plant Society - The WNPS is an organization dedicated to the conservation of the native plants of Washington State.

Wildflower Association of Michigan - "Information about the wildflower conference, educational grant programs, and link directory."

Wyoming Native Plant Society - "Encourages the appreciation and conservation of the native flora and plant communities of Wyoming through education, research, and communication. Information about membership, activities, and plant identification references."