Canadian Botanical Conservation Network
A registered charitable organization which helps conserve biological diversity through networking tools and conservation programs for botanical gardens and arboreta.
City Farmer's Urban Agriculture Notes
A non-profit society that promotes urban food production and environmental conservation.
International Code of Nomenclature for Cultivated Plants
A list of worldwide contacts of associations organised in taxonomic order.
The Garden Club of America
Umbrella organization for US and Canadian local garden clubs. Sites lists clubs and their websites, botanical gardens, pamphlets, and position papers.
The Mediterranean Garden Society
International society for gardeners in Mediterranean climates. History, membership information, journal contents, news, and event listing.
The Professional Gardeners Guild
An organisation for gardeners employed in private gardens and estates. Based in the UK with members in European countries and the United States.