Theodore Payne Foundation -- a trove of information and guidance on going native with your landscape! Take a class and/or visit their nursery!
Las Pilitas Nursery-- A California native plant, retail and online to your door, nursery in Central California between Paso Robles and San Luis Obispo. Grows only California natives. A wealth of information delivered with a rye sense of humor.
El Nativo Growers, Inc. -- A nursery specializing in high quality plants from California, Australia and other Mediterranean climates that thrive in the Southern California environment. Not open to the public, but use their website for lots of information about Mediterranean (including California native) plants!
Gardening in LA-- A wealth of resources for food gardening (and ornamental gardening). A resource provided by Yvonne Savio, Master Gardener teacher extraordinaire. Poison Free Malibu-- Wildlife-safe ways to reduce rat and mice presence on your property.
Mostly Native Nursery -- Tools for learning about and selecting California native plants https://www.mostlynatives.com
The Mindful Gardener Landscape Design Specializing in California Native and Drought Tolerant Designs Serving the Northeast Los Angeles Area and Surrounding Neighborhoods Maggie Haase | firstname.lastname@example.org | 818-720-6972