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CEANOTHUS arboreus 'Trewithen Blue'
Commonly known as Catalina ceanothus, Catalina mountain lilac
Largest blue
Further Reading....
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Evergreen - oval to rounded dark-green leaves to 10cm (4in) long.
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Blue -
Height - 6m (20ft) -
Spread - 8m (26ft)
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Tall Shrub - vigorous, spreading shrub or small tree. Mid-blue flowers in large, pyramidal, terminal and lateral panicles to 12cm (5in) long.
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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) -
Full sun - with shelter from cold winds. Most do well trained against a wall. -
Additional Features - 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 -
Garden Location/Conditions - Coastal / windswept
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Hardiness - Frost hardy (down to -5) -
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Scented Plants - Scented flowers
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Seasonal Interest - Spring
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Soil Conditions - Fertile well drained soil
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Tolerates all - can be lime tolerant but leaves may become chlorotic on shallow chalk soils.
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Wildlife - Bee friendly -
Butterfly friendly
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Rabbit Resistant
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Ceanothus - Growing Guide
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6m (20ft)
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8m (26ft) |
Useful extras...
Fertilisers & Feeds - Vitax
Q4 Pelleted Fertiliser
A useful fertiliser suitable for use on a wide variety of plants. Q4 provides all the nutrients and trace elements essential for vigorous growth, abundant flowering and ripening of fruit.
3 options from £6.00
Fertilisers & Feeds - Empathy
Rootgrow mycorrhizal fungi
Recommended by the RHS. Contains Rootgrow™ mycorrhizal fungi. Suitable for all trees and shrubs (except rhododendrons, azaleas, heathers, cranberries and blueberries)
2 options from £6.00
Fertilisers & Feeds - Empathy
All-purpose Seaweed Stimulant
All-purpose organic concentrated seaweed feed that is a ready to use, derived from sustainable harvested kelp, that can be used on all outdoor and indoor plants, except acid loving plants.
Perfect used in conjunction with Rootgrow™.
Only £7.50
Garden Goodies
Slate Plant Labels
These wonderfully tactile natural slate plant labels are hand made in Cornwall and come with a chalk pen.
Just stick them in your pot or border. Pack of 6.
Only £10.20
Garden Goodies
Slate Tie-on Plant Labels
Hand made in Cornwall, these delightful natural slate labels are perfect for pots.
Comes with chalk pen. Pack of 5
Only £10.20
Garden Goodies
Sisal Twine
2ply sisal garden twine - 250 grams
Only £4.50
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