Since most California natives bloom in spring, combine them with plants that flower at other times. Blanc added butterfly weed (Asclepias tuberosa), coral fountain (Russelia equisetiformis), and Mexican lobelia (Lobelia laxiflora) for summer color.
Calflora is a website you can use to learn about plants that grow wild in California (both native plants and weeds). You can also enter a place and get an illustrated list of the plants that grow there. We call that What Grows Here? You define "here" by zip code, place name, or any of a number of other ways.