- Botanic Gardens Conservation International - An international clearing house mechanism for botanic gardens, based in Surrey.
- Arboricultural Information Exchange. - The AIE site has news, links and collections of resources for arboriculture.
- Economic Botany at Kew - A useful set of web links to research, information, collections and educations sites. Based at the RBG Kew website.
- Wye College National Fruit Collections - The UK National Fruit Collection maintains the genetic stock of cultivated top and bush fruit.
- HDRA - Heritage Seed Library - The Heritage Seed Library aims to conserve as much biodiversity as it can and make as many varieties of vegetables available as possible.
- Top Trees UK - Register of Notable Trees - Free searchable register of notable UK trees with photo galleries.
- National Council for the Conservation of Plants and Gardens - Organises and coordinates the conservation and preservation of plants in national collections. Information on collections, local groups, news and events.
- Horticulture Research International - Principal UK organisation tasked with carrying out horticultural research and development (R&D) and transferring the results to industry. Site provides details of research across horticultural sectors.
- Frontpage for Trees - An informational resource for urban and garden trees, including details of fungi and mycorhizza.
- Green Flag Award - Details of the national standard for parks and green spaces in England and Wales.
- The Accidental Smallholder - Describes the experiences of a couple who became smallholders, and offers information and resources to others seeking to do the same.
- People and Plants Online - The People and Plants Initiative, involving WWF, UNESCO, and Kew Gardens, working on applied research projects, community workshops, exchanges and training courses with young ethnobotanists.
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