Penstemon heterophyllus

Prunus lyonii (Catalina Cherry) and Prunus ilicifolia (Holly leaf Cherry) are two evergreen shrubs that are extremely useful as screens or background plants. They both have red berries in late summer which the birds find very desirable.  

Another diverse and useful genus is Salvia. The Clevelandii group includes ‘Allen Chickering’, ‘Whirly Blue’, ‘Pozo Blue’ and ‘Winifred Gilman’.  In need of an attractive, drought tolerant ground cover? Try ‘Bee’s Bliss’. This salvia has gray green leaves with lavender flowers in spring; it will spread three to four feet wide or more. Salvia spathacea (Hummingbird sage) A…

Buckwheats provide color spring and summer. Eriogonum umbellatum (sulphur buckwheat) sports bright yellow flowers in spring. Eriogonum giganteum (St. Catherine’s Lace) is topped with creamy clusters of flower sprays reaching as high as five feet. The star of the genus, Eriogonum grande var. rubescens (rosy buckwheat) displays rosy buttons atop rounded gray-green leaves for most of…

Another very showy native is Dendromecon harfordii (California bush poppy).  In late spring, it is covered in bright yellow flowers and flowers intermittently throughout the summer.  

There are many species of Ribes, both evergreen and deciduous.  A very nice evergreen species is Ribes viburnifolium with roundish, dark green leaves and dark red stems.  It needs no irrigation, making it ideal for planting under oaks.  It grows three to six feet tall and can spread to twelve feet. A lovely deciduous species is…

For the shade, try Heuchera maxima, a cream flowering coral bell that looks great under oak trees and needs very little water.