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Ceanothus arboreus (Feltleaf ceanothus)

Other names: Felt-leaf ceanothus, Catalina ceanothus, Island ceanothus, Island mountain lilac, Tree lilac, Catalina mountain lilac

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Species
C. arboreus is an upright, borderline hardy, evergreen shrub or small tree with large, broadly ovate, glossy, dark green leaves, felted beneath, and conical panicles of fragrant, light blue flowers in spring.
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Season of interest

Flower

Spring Summer Autumn Winter
Flower

Foliage

Spring Summer Autumn Winter
Foliage
Height and spread

Height and spread

Size Max height Max spread To maturity
6 m 4 m 10-20 years
19 ft 13 ft 10-20 years

Where to grow

Soil type
  • Loamy
  • Sandy
Soil drainage
  • Moist but well-drained
  • Well-drained
Soil pH
  • Alkaline
  • Neutral
Sunlight
  • Full Sun
Aspect
  • East
  • West
  • South
Exposure
  • Sheltered

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Additional plant details

Cultivation

Plant in well-drained soil. Needs full sun in coastal areas and afternoon shade in warm, dry inland valleys. Tolerates drought along the coast but needs water in hot, dry summers. Tolerates clay.

Suggested uses

Banks and Slopes, Coastal, Beds and borders, Mediterranean, City, Drought Tolerant, Hedging/Screens, Wallside and trellises, Planted in groups

UK hardiness

H4

USDA zones

Zone 8, Zone 9, Zone 10

Sunset zone

4, 5, 6, 7, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24

WUCOLS

North-Central Coastal = Low
Central Valley = Low
South Coastal = Low
South Inland = Moderate/Medium
High and Intermediate Desert = Inappropriate
Low Desert = Inappropriate

Foliage

Evergreen

Habit

Upright

Native to

California

Drought tolerant

Yes

Flood tolerant

No

Toxicity

Not toxic

Plant care

Pruning

Pruning group 8 after flowering. Mulch and feed after pruning.

Propagation methods

Semi-hardwood cuttings, Semi-ripe cuttings

Pests

Scale insects

Deer

Diseases

Honey fungus

Phytophthora root diseases

Prune out unsightly shoots only (only when needed)

Plant container grown plants in deep fertile, well-drained soil

Take semi-hardwood cuttings in late-summer

Plant container grown plants in a sunny sheltered spot

Protect from hard winter frosts

Plant in fertile, humus-rich, well-drained soils

Other plants

Plants in this Genus (70)

Ceanothus

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Ceanothus (any evergreen variety)
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Ceanothus (any evergreen variety) Californian lilac (any evergreen variety)
Ceanothus 'Tuxedo'
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Ceanothus 'Tuxedo' California lilac 'Tuxedo'
Ceanothus 'Blue Sapphire'
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Ceanothus 'Blue Sapphire' California lilac 'Blue Sapphire'
Ceanothus x veitchianus
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Ceanothus x veitchianus Veitch ceanothus
Ceanothus 'Blue Cushion'
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Ceanothus 'Blue Cushion' California lilac 'Blue Cushion'
Ceanothus 'Tilden Park'
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Ceanothus 'Tilden Park' Californian lilac 'Tilden Park'
Ceanothus arboreus 'Trewithen Blue'
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Ceanothus arboreus 'Trewithen Blue' Feltleaf ceanothus 'Trewithen Blue'
Ceanothus 'Autumnal Blue'
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Ceanothus 'Autumnal Blue' Californian lilac 'Autumnal blue'
Ceanothus 'Burkwoodii'
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Ceanothus 'Burkwoodii' Californian lilac 'Burkwoodii'
Ceanothus 'Concha'
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Ceanothus 'Concha' Californian lilac 'Concha'
Ceanothus thyrsiflorus var. repens
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Ceanothus thyrsiflorus var. repens Creeping blue blossom
Ceanothus 'Puget Blue'
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Ceanothus 'Puget Blue' Californian lilac 'Puget Blue'
Ceanothus 'Blue Mound'
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Ceanothus 'Blue Mound' Californian lilac 'Blue Mound'
Ceanothus 'Dark Star'
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Ceanothus 'Dark Star' Californian lilac 'Dark Star'
Ceanothus 'Cascade'
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Ceanothus 'Cascade' Californian lilac 'Cascade'
Ceanothus x delileanus 'Topaze'
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Ceanothus x delileanus 'Topaze' Californian lilac 'Topaze'
Ceanothus 'Blue Jeans'
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Ceanothus 'Blue Jeans' California lilac 'Blue Jeans'
Ceanothus 'Southmead'
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Ceanothus 'Southmead' Californian lilac 'Southmead'
Ceanothus thyrsiflorus 'Millerton Point'
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Ceanothus thyrsiflorus 'Millerton Point' Blueblossom 'Millerton Point'
Ceanothus x pallidus 'Marie Simon'
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Ceanothus x pallidus 'Marie Simon' Pink Californian lilac
Ceanothus 'Eldorado'
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Ceanothus 'Eldorado' Californian lilac 'Eldorado'
Ceanothus 'Zanzibar'
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Ceanothus 'Zanzibar' Californian lilac 'Zanzibar'
Ceanothus griseus var. horizontalis 'Silver Surprise'
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Ceanothus griseus var. horizontalis 'Silver Surprise' Carmel creeper 'Silver Surprise'
Ceanothus 'Centennial'
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Ceanothus 'Centennial' California lilac 'Centennial'
Ceanothus 'Skylark'
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Ceanothus 'Skylark' Californian lilac 'Skylark'
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