About
Ceanothus arboreus 'Trewithen Blue' is a robust evergreen shrub that can grow up to 6 meters tall and spreads widely. Its leaves are broad, oval to rounded, and dark green, reaching lengths of up to 8 centimeters. In spring and early summer, it produces pyramidal clusters of mid-blue flowers, each panicle measuring up to 12 centimeters long, which emit a light fragrance.
About the genus
Ceanothus consists of either evergreen or deciduous shrubs and small trees, characterized by simple leaves and clusters of small flowers that can be blue, pink, or white. These plants are known for their rapid growth, though they often have a limited lifespan.
Growing conditions
- Sunlight
- Full sun
- Soil type
- Loam, Sand
- Soil pH
- Alkaline, Neutral, Acid
- Soil moisture
- Well-drained
- Aspect
- West-facing, South-facing
- Exposure
- Sheltered
- UK hardiness
- H4
Plant details
- Plant type
- Shrubs
- Habit
- Bushy, Spreading branched
- Foliage
- Evergreen
- Height
- 4-8 metres
- Spread
- 4-8 metres
- Time to full height
- 5-10 years
- Suggested uses
- Architectural, City and courtyard gardens, Coastal, Cottage and informal garden, Mediterranean climate plants, Wildlife gardens
- Fragrance
- Flower
Care notes
- Cultivation
- Grow in fertile, well-drained soil in full sun with shelter from strong, cold winds. Lime tolerant but may become chlorotic on shallow chalk soils. See ceanothus cultivation
- Pruning
- Pruning group 8 after flowering or pruning group 13 if wall trained
- Propagation
- Propagate by semi-ripe cuttings in mid- to late summer
- Pest resistance
- May be susceptible to scale insects
- Disease resistance
- May be susceptible to honey fungus