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Ceanothus Trewithen Blue | Californian lilac 'Trewithen Blue' - 200-220cm, 20lt

Ceanothus Trewithen Blue | Californian lilac 'Trewithen Blue' - 200-220cm, 20lt

Regular price £96.00 GBP
£96.00 GBP Regular price Sale price
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Zone 1 and 2 shipping from £25 - £40, depending on the postcode
Pallet delivery from £40 - £80, depending on the postcode
Free shipping on orders over £350

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Ceanothus ‘Trewithen Blue’, or California Lilac ‘Trewithen Blue’, is a large, vigorous, spreading, evergreen shrub with elegant, arching branches and oval, glossy, dark green leaves. A profusion of fragrant, rich blue flower panicles bloom from April to June, covering the whole shrub and creating a wonderful display. Attractive to bees, butterflies, and hummingbirds. Ceanothus ‘Trewithen Blue’ can tolerate a wide range of soils, but prefers moderately fertile, slightly acidic, moist, well-drained soils. It thrives in full sun, but can tolerate light shade. In hot summer areas, it appreciates some afternoon shade. Once established, tolerant of drought. It can withstand frost, but needs to be sheltered from harsh, winter winds. May require pruning after flowering. Very difficult to transplant. Californian lilac 'Trewithen Blue' is a wonderful, abundantly flowering shrub, great as a specimen plant in cottage, urban, and rock gardens. Excellent for beds and borders and informal hedges and screens.
  • Common Name

    Californian lilac 'Trewithen Blue'

  • Family


  • Type

    evergreen shrub

  • Pot Size


  • Height (cm)


  • Native To

    garden origin, UK

  • Flower

    fragrant, rich blue flower panicles

  • Foliage

    oval, glossy, dark green leaves

  • Maturation period

    10–20 years

Key Info

Size & Spacing

Mature Height


Mature Width


Shape / habit


Preferred Location


West–facing or South–facing or East–facing, sheltered

Soil Type

alkaline, neutral, full sun

Soil moisture

moist but well–drained, well–drained

Growing Period


spring, summer


all year



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  • Unbeatable Quality

    Since we only grow and sell trees, in 40 years we have figured out how to do it very well.

  • Expert Advice

    Ask our experienced staff for advice. Happy to help once bought, simply email if any problems or come over for a chat.

  • Free Delivery for online orders over £350

    We will deliver your tree and plant it for you. Or 10 trees or a 100.

Arundel Arboretum is a shrub and tree retail nursery with over 40 years of experience.

About Us

During this time, we have developed a large stock of trees, mature evergreen shrubs, conifers, Japanese maples, cedars and olives. What sets us apart from a generic garden center is solid unwavering focus on trees and some bigger shrubs. You will find thousands of trees, hundreds of varieties and lots of experts who are working on the nursery and more than willing to help you to choose a plant for you.

What you will not find is hot tubs, garden furniture and plastic garden gnomes. In a nutshell, trees is what we know and trees is what we do, and only trees (and some shrubs to go with the trees).

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Where we are located


Arundel Arboretum Ltd Scotland Barn Chichester Road Arundel West Sussex BN18 0AD

Contact Us

Monday - Friday

8:00 am - 5:00 pm

Saturday - Sunday

9:00 am - 4:00 pm

Bank Holidays

9:00 am - 4:00 pm

Easter Sunday - Closed

Christmas & New Year Closed between Christmas and New Year