A registered charitable organization which helps conserve biological diversity through networking tools and conservation programs for botanical gardens and arboreta.

A non-profit society that promotes urban food production and environmental conservation.

A directory of all local and national gardening related clubs, societies and organisations in the UK.

An extensive list of worldwide contacts of associations organised in taxonomic order.

Special thoughts on growing plants, various links and member information.

Organization encouraging environmentally friendly methods for lawn care such as the reuse of rainwater and natural pest collectors.

Umbrella organization for US and Canadian local garden clubs. Sites lists clubs and their websites, botanical gardens, pamphlets, and position papers.

International society for gardeners in mediterranean climates. History, membership information, journal contents, news, and event listing.

An organisation for gardeners employed in private gardens and estates. Based in the UK with members in European countries and the United States.