The garden is a living museum of California native plants located within Tilden Park in the hills above Berkeley, California. It is a 10 acre sanctuary for thousands of the states rare and endangered plants in many habitats from the High Sierra to the serpentine barrens of the Coast Ranges, and from the northern rain forests to the southern deserts. Flowers bloom every month of the year, reaching a spectacular peak in spring through midsummer. In the fall and winter, the garden is decorated with the vibrant hues of ripening fruits, changing leaves, and colorful twigs. There are a number of different ways volunteers can support or work in the Garden by propagating plants, collecting and packaging seed, leading tours of the Garden as a docent, assisting the gardeners and working on projects with the Friends of the Regional Parks Botanic Garden.
The Hesperian publishes books and newsletters on public health and social and environmental justice. Positions include attending on site talks with local and international speakers, researching topics for books, packing books and general administrative support.