Top Plants For Sonoma County
Clear blue flower in summer followed by red foliage in fall.
Prized for brilliant blue blossoms in summer and fall and round foliage that glows with autumn colors, these resilient plants survive in full sun in water-retentive soils even without summer irrigation. C. griffithii is a twiggy, slowly spreading evergreen shrub. C. willmottianum spreads by underground runners to form a thicket; deciduous stems turn brown in winter and must be cut to the ground before spring. C. plumbaginoides, known as dwarf plumbago, is a deciduous slowly spreading groundcover that requires shearing in winter.