See also: Master Gardeners • Wildflowers and Natives • Regional
The Mediterranean Garden Society
mediterraneangardensociety.org
International society for gardeners in mediterranean climates. History, membership information, journal contents, news, and event listing.
The Brown Lawn Society
brownlawnsociety.org
Organization encouraging environmentally friendly methods for lawn care such as the reuse of rainwater and natural pest collectors.
The Garden Club of America
gcamerica.org
Umbrella organization for US and Canadian local garden clubs. Sites lists clubs and their websites, botanical gardens, pamphlets, and position papers.
The Professional Gardeners Guild
pgg.org.uk
An organisation for gardeners employed in private gardens and estates. Based in the UK with members in European countries and the United States.
City Farmer's Urban Agriculture Notes
cityfarmer.org
A non-profit society that promotes urban food production and environmental conservation.
International Code of Nomenclature for Cultivated Plants
ishs.org
An extensive list of worldwide contacts of associations organised in taxonomic order.
Lesbian Gardens
lesbiangardens.net
Special thoughts on growing plants, various links and member information.
Gardeners Club
gardenersclub.co.uk
A directory of all local and national gardening related clubs, societies and organisations in the UK.
Canadian Botanical Conservation Network
rbg.ca
A registered charitable organization which helps conserve biological diversity through networking tools and conservation programs for botanical gardens and arboreta.