Dedicated to the study of the genus, species and cultivars, as well as culture, habits, and hardiness. Event schedule, new introductions, photographs and resources.

Gives information about azaleas, "the royalty of the garden". There are azaleas for almost any growing situation you have, with almost any color, habit and height you desire

Society for people interested in hollies, including both novices and skilled growers, to exchange information through scientific studies, publications, meetings, visiting holly collections, and other educational activities. Includes information about various species.

Society for Syringa enthusiasts. Information about publications, and awards, with lists of sources and a members-only site.

Information on membership, events, publications, and seed exchange, and for each of the plant groups an overview of cultivation information, species, and hybrids, with photo gallery.