The Geraniaceae Group
Contains newsletters, a booklist, photos, and information about the group's advocacy.
Site of an organization that promotes the cultivation and conservation of hebes and other native New Zealand plants. With a plant list and links to other pages of interest.
The Mediterranean Garden Society
Serves as an international forum for the furthering of gardening knowledge and the appreciation of plants and gardens fit for the mediterranean climate.
New Ornamentals Society
Introduces a group of professional horticulturalists, taxonomists, students, and landscape designers who are into discovering new ornamental landscape plants.
Royal Horticultural Society
Contains gardening news, an online shop for gardening tools and supplies, and information on garden plants and designs.