Ceanothus Trewithen Blue A particularly free-flowering ceanothus bred in Cornwall, Ceanothus arboreus Trewithen Blue is a large, vigorous, evergreen shrub or small tree for the larger garden, with graceful, arching branches. Can be grown free-standing or wall-trained. The leaves are large, oval, and a glossy deep-green. In May and June masses of deep blue, slightly scented flower-spikes almost smother the plant, making for a stunning display. Very attractive to early butterflies and bees. Less hardy than some ceanothus, it likes a sunny, warm spot sheltered from cold, drying winds. Californian lilac Trewithen Blue holds the RHS Award of Garden Merit. Site: Sheltered; will tolerate salt airSoils: Any really well-drained soilPosition: Full sunSeason of interest: All year, especially early summerHardiness: Frost-hardyHeight up to 20’ (6m) Spread to 25’ (8m)