The Regional Parks Botanic Garden is a 10-acre botanical garden located in Tilden Regional Park in the Berkeley Hills, east of Berkeley, California, in the United States. It showcases California native plants, and is open to the public in daylight hours every day of the year except New Year's Day, Thanksgiving, and Christmas.The Garden was founded on January 1, 1940. Notable specimens include nearly all the state's conifers and oaks, a very good collection of wild lilacs, perhaps the most complete collection of California manzanitas anywhere, expanding collections of Californian native bunchgrasses and aquatics, and representatives of some 300 rare and endangered vascular taxa of California. The Garden is organized into sections, each representing a distinctive natural area in California: Southern California Shasta-Klamath Valley-Foothill Santa Lucia Channel Islands Sierran Redwood Sea Bluff Pacific Rain Forest Franciscan
