Answer: Native plants are probably the best choices in terms of drought resistance and low maintenance. you can mix and match to make a good slope planting.
Arctostaphylos edmundsii (Carmel Sur' manzanita) is a flat evergreen shrub(arches to 3 inches high in middle), with light gray-green leaves.
Artemisia california (California sagebrush) is an evergray shrub, three to four foot high.
Baccharis pil. 'Pigeon Point' grows into a one foot tall by twelve foot wide dark-green groundcover.
Ceanothus griseus horizontialis is an evergreen shrub that commonly grows two or three feet tall and ten feet wide.
Ceanothus thyrsiflorus repens is a prostrate Ceanothus with lots of attractive sky blue flowers.
Salvia sonomensis A creeping flat perennial sage that can spread to 10' across. Its flowers are blue-violet from May to June, appearing in a 6"spike above gray-green leaves that lie on the ground 1" or so high.
Hope these suggestions help.
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