Common Name: Californian LilacLatin Name: Ceanothus arboreus ‘Trewithen Blue’Soil: well-drained soilPosition: Full sunFlowering period/colour: Mid to late Spring/ Deep blue flowersHardiness: Frost hardyEventual height/spread: 5m x 6mSpecial features: A round headed shrub, ideal for growing up a south facing wall. (Evergreen) Ceanothus ‘Trewithen Blue’ is perhaps best grown as a…