Theodore Payne Foundation offers a FREE tour of their gardens on First Sundays from 8 am – 1 pm. Theodore Payne Foundation for Wild Flowers and Native Plants is located at 10459 Tuxford Street, Sun Valley, CA 91352.
The following is from http://theodorepayne.org:
The Theodore Payne Foundation, established 1960, operates a year-round, retail nursery offering the region’s largest and most interesting selection of California native plant – hundreds of different species and cultivars, many of which are drought tolerant and low maintenance. Our Education Center and Outreach programs offer classes and field trips for adults and children.
Our mission is to preserve, propagate and promote California native plants, seeds and wild flowers – native treasures that conserve water and other resources, provide habitat for wildlife, and add color and fragrance to the garden. Our Sun Valley grounds in the NE corner of the San Fernando Valley (map) are a great place to visit. The TPF store stocks books, seeds, garden tools and more. You’ll also find an art gallery, picnic area, hiking trails and expert staff to answer questions about native plants. On-leash dogs are welcome. There is no admission fee.