| 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. |
| Gardeners Club: A directory of all local and national gardening related clubs, societies and organisations in the UK. |
| International Code of Nomenclature for Cultivated Plants: An extensive list of worldwide contacts of associations organised in taxonomic order. |
| Lesbian Gardens: Special thoughts on growing plants, various links and member information. |
| The Brown Lawn Society: Organization encouraging environmentally friendly methods for lawn care such as the reuse of rainwater and natural pest collectors. |
| 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. |
Classical
