California Native Plant Society

California Native Plant Society–dedicated to the conservation of California native plants and their natural habitats, and to increasing the understanding, appreciation, and horticultural use of native plants. There are many chapters.

California Native Garden Foundation

California Native Garden Foundation, San Jose, CA–a non-profit educational, research, and resource organization that promotes gardening with California native plants, our goal is to increase the popularity and use of California’s native plants in the designed landscape. We are devoted to educating the public and design community on the value of native gardens. Classes, field trips, lectures, garden tours, and publications are available to members, landscape professionals, and the public. Follow on Facebook.

California Botanical Society

California Botanical Society–has served a major role in advancing western American botany.