Regional Parks Botanic Garden at Tilden Park in Berkeley, CA. Established in 1940, the garden’s primary role is to create beautiful landscapes displaying California’s diverse plant life. Its mission embraces not only aesthetics, but also native plant conservation, public education, and horticultural experimentation designed to bring new native plants into the nursery trade. In the garden’s many habitats are species from the high Sierra to the serpentine barrens of the coast ranges, and from the northern rain forests to the southern deserts. They offer a schedule of fun and informative classes, field trips, and workshops, as well as plant sales and seed sales.