Landscaping Around California Native Oaks, from the Santa Clara Chapter of the California Native Plant Society, is well worth viewing, particularly if you want to learn more about how to care for your Oaks.
California Oaks Foundation A Good Source Of Information
This organization is located in Oakland, California, and is dedicated to the conservation and perpetuation of California’s native oaks. While focusing on woodlands, it publishes information helpful to those of us who live with native oaks of all sizes.
Care of California’s Native Oaks (PDF)
Compatible Plants Under & Around Oaks (PDF)