California Lilac 'Concha'

'Concha' is frequently cited by horticultural experts as one of the best Ceanothus cultivars for UK gardens due to its reliable performance and intense flower colour. This medium-sized evergreen shrub has a graceful, arching habit and small, dark green, deeply veined leaves. In late spring and early summer, it produces an overwhelming abundance of deep indigo-blue flower clusters that emerge from reddish buds, creating a stunning visual contrast. It is moderately hardy (H4) and thrives best when planted against a warm, south-facing wall which provides protection from cold, drying winds. Like most Ceanothus, 'Concha' requires very well-drained soil and a position in full sun. It does not like to be heavily pruned; however, a light trim of the spent flower heads immediately after blooming can help maintain its shape. It is a magnet for bees and provides a spectacular splash of blue that is rare in the garden landscape.

Sun: Full sun.

Soil: Well-drained, light soil.

Hardiness: H4 — down to −10°C.

Flowering: May, Jun.