Plant encyclopedia›Californian lilac 'Trewithen Blue'

Californian lilac 'Trewithen Blue'

Also known as: Information to be completed

A large vigorous, spreading evergreen shrub to 6m in height, with broadly oval or rounded dark green leaves to 8cm in length, and slightly fragrant, mid-blue flowers in pyramidal panicles to 12cm in length, borne in spring and early summer

Scientific classification

Species: Californian lilac 'Trewithen Blue' (Ceanothus arboreus 'Trewithen Blue')
Genus: Ceanothus
Family: Rhamnaceae

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Toxicity: Shrubs
Plant type: 4-8 metres
Height: 4-8 metres
Spread: Evergreen
Foliage: Bushy
Habit: Spring · Summer · Autumn · Winter
Season of interest: Full sun
Sunlight: Information to be completed
Ideal temperature

Californian lilac 'Trewithen Blue' pictures

Distribution of Californian lilac 'Trewithen Blue'

Distribution map

Distribution of the original taxon: Ceanothus arboreus

Native
Introduced
Cultivated

Source：WCVP v16 · Royal Botanic Gardens, Kew · CC BY 3.0 · Boundaries：WGSRPD / TDWG

Culture

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Toxicity

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Quick identification of Californian lilac 'Trewithen Blue'

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Californian lilac 'Trewithen Blue' care guide

Let upper soil dry lightly then water thoroughly to full saturation
Watering: Full sun
Sunlight: Information to be completed
Ideal temperature

Watering

Let upper soil dry lightly then water thoroughly to full saturation

Fertilizing

Diluted flowering shrub fertilizer monthly in spring and summer time

Pruning

For free-standing plants: Usually little pruning is needed. Lightly shape if necessary, removing dead, damaged or diseased shoots. Prune after flowering. For wall-trained specimens: On established wall-trained shrubs, shorten sideshoots to two to four buds from the framework; remove shoots growing towards the wall. Prune annually after flowering on last-year growth, or in late winter or early spring on current-year growth.

Propagation

Propagate by semi-ripe cuttings in mid- to late summer

Growing

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

More growing and care information →