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Shrubs

Ceanothus thyrsiflorus 'Arroyo de la Cruz'

Californian lilac 'Arroyo de la Cruz'

An upright, evergreen shrub to 1.2m high and 2m wide, with arching branches and small, glossy, mid-green leaves. Bears large clusters of tiny, pale to mid-blue flowers in spring

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Ultimate height

1–1.5 metres

Time to ultimate height

5–10 years

Ultimate spread

1.5–2.5 metres

Loam

Sand

Moisture

Well–drained

pH

Alkaline, Neutral, Acid

	Stem	Flower	Foliage	Fruit
Spring
Summer
Autumn
Winter

Full sun

Aspect

South–facing or West–facing

Exposure

Sheltered

Drought resistance

Yes

Hardiness
Hardiness ratings
All ratings refer to the UK growing conditions unless otherwise stated. Minimum temperature ranges (in degrees C) are shown in brackets
H1a: under glass all year (>15C)
H1b: can be grown outside in the summer (10 - 15)
H1c: can be grown outside in the summer (5 - 10)
H2: tolerant of low temperatures, but not surviving being frozen (1 to 5)
H3: hardy in coastal and relatively mild parts of the UK (-5 to 1)
H4: hardy through most of the UK (-10 to -5)
H5: hardy in most places throughout the UK even in severe winters (-15 to -10)
H6: hardy in all of UK and northern Europe (-20 to -15)
H7: hardy in the severest European continental climates (< -20)

Botanical details

Family: Rhamnaceae
Native to the UK: No
Foliage: Evergreen
Habit: Bushy
Genus: Ceanothus can be evergreen or deciduous shrubs or small trees, with simple leaves and small blue, pink or white flowers in profuse axillary or terminal clusters. They are fast-growing but may be short-lived
Name status: Unresolved

How to grow

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

Propagation

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

Suggested planting locations and garden types

City and courtyard gardens
Cottage and informal garden
Mediterranean climate plants
Wildlife gardens
Wall side borders
Flower borders and beds

Pruning

Pruning group 8, after flowering

Pests

May be susceptible to scale insects

Diseases

May be susceptible to honey fungus

Get involved

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