| Canadian Botanical Conservation Network | | A registered charitable organization which helps conserve biological diversity through networking tools and conservation programs for botanical gardens and arboreta. |
| Gardeners Club | | A directory of all local and national gardening related clubs, societies and organisations in the UK. |
| 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. |
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