American Horticultural Society // AHS

California Rare Fruit Growers // “Pushing the Limits and the Range of Fruit Growing Worldwide”

Hebe Society // Promoting the cultivation and conservation of the genus Hebe and other New Zealand plants

Home Orchard Society // A nonprofit educational organization dedicated to assisting both novice and expert growers and promoting the science, culture, and pleasure of growing fruit.

International Clematis Society // ICS

International Oak Society // IOS

The American Rose Society // ARS

The International Society of Arboriculture // ISA

The Maple Society // For those interested in the genus Acer