Ceanothus thyrsiflorus repens (Creeping ceanothus)
C. thyrsiflorus var. repens is vigorous, low-growing, spreading, evergreen shrub with ovate, glossy, wrinkled, dark green leaves and compact panicles of blue flowers in spring and early summer.
Grow in well-drained, neutral to alkaline soil in a sheltered, sunny site. Will reach a height of 1.5m and a spread of 4m after 10-20 years.