The San Diego chapter of the California Native Plant Society has a started a new native gardening committee which is focusing on promoting CA native plants in the landscape. They are providing a host of free information on how to garden with native plants!!
A series of informational brochures are posted in PDF form on their website and can be downloaded for free. New fliers will be added periodically as they are completed. They also have lists of native nurseries, information about invasive species, and a list of public native gardens.
They have also begun hosting free 30 minute "Natives for Novices" seminars before their monthly chapter meetings at Balboa Park. The seminars are given by local native gardening experts and cover a range of subjects from plantings for slopes to how to irrigate a drought tolerant/native landscape. Dates and times are posted on the main page of the CNPSSD website.