CEANOTHUS arboreus 'Trewithen Blue'
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CEANOTHUS arboreus 'Trewithen Blue'
Commonly known as Catalina ceanothus, Catalina mountain lilac
Largest blue
Full Plant Details - Sun/Soil & other attributes
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Floweringlocal_floristJanlocal_floristFeblocal_floristMarlocal_floristAprlocal_floristMaylocal_floristJunlocal_floristJullocal_floristAuglocal_floristSeplocal_floristOctlocal_floristNovlocal_floristDec
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Good to know
Wildlife plant - insects -
Pests & Diseases
honey fungus. -
Place of origin
Native to Catalina Islands, California, USA. This selection bred at Trewithen Gardens, Grampound, Cornwall, UK -
EvergreenOval to rounded dark-green leaves to 10cm (4in) long.
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Blue
Mid-blue -
PaniclesLarge, pyramidal, terminal and lateral panicles to 12cm (4¾in) long
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BorderSuitable for a shrub border
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Coastal / windsweptSuitable for an open site slightly back from the sea
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Cottage garden
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Town garden
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Fully hardy
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Serrulate
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Oblong
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Height
6m (20ft) -
Spread
8m (26ft) -
Tall ShrubVigorous, spreading shrub or small tree
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Pruning group 5
Suitable for: Evergreen shrubs that require minimal pruning.
Action: Trim or lightly cut back shoots that spoil symmetry. Deadhead regularly.
When: Annually after flowering.
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Hardy - average winter
Hardy through most of the UK apart from inland valleys, at altitude and central/northerly locations. May suffer foliage damage and stem dieback in harsh winters in cold gardens. Plant can withstand temperatures down to -10°C (14°F) -
Scented flowers
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Spring Seasonal Interest
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Fertile well drained soil
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Free draining sandy soil
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Full sun
With shelter from cold winds. Most do well trained against a wall. -
Bee friendly
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Butterfly friendly
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Rabbit Resistant
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Mature Size6m (20ft)
8m (26ft)
View Detailed Plant Description
View Planting Tips and Care Advice
Ceanothus - Growing Guide