Ceanothus arboretus 'Trewithen Blue' - Californian Lilac Tree

Ceanothus arboreus 'Trewithen Blue' is one of the largest and most striking Californian Lilacs. In late spring to early summer, it becomes smothered in huge clusters of vivid, deep blue flowers, creating an unforgettable display against its glossy, dark, evergreen foliage.

Perfect for Mediterranean-style gardens, coastal settings, or as a dramatic specimen plant, ‘Trewithen Blue’ thrives in full sun and prefers well-drained, moderately fertile soil. Shelter it from cold winds to protect the early flowers, and prune lightly after flowering to keep it in shape and encourage fresh growth. Its intense blooms pair beautifully with silver-leaved plants, lavenders, or ornamental grasses, which enhance its vibrant blue tones.

Supplied in approx. 12 litre containers,