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Ceanothus arboreus - 'Trewithen Blue' (Californian Lilac)

Type Shrub (Multi-stemmed Plant), Evergreen, Flowering
Form Rounded Multi-Stemmed Bush, Architectural Form
Size Large Border / Screening Plant (1.8 to 3m height)
Colours Dark blue Flowers (Summer), Lime green Foliage
Care Some Maintenance Required - Tough Plant
Hardiness Frost hardy, Drought Tolerant, Seaside Friendly
Growth Fast Growing Plant
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Ceanothus arboreus Description

This larger upright growing Ceanothus is a dense growing evergreen shrub that bears masses of tight clusters of dark blue flowers in spring / early summer. Dense dark green foliage is attractive all Year round. Good for wall training. 2m tall x 3m


Ceanothus arboreus - Cultivation Notes

Ceanothus will tolerate a wide range of low fertility soil types just as long as they are well drained. For best results plant in a warm sheltered spot in full sun; make best use of this tough plant by using it in hot dry problem spots where it will flourish in the poorest of soils, including chalk. Ceanothus do not appreciate the cold or shade. Prune lightly to shape in early Spring.


Strengths, Weaknesses & Design Usage


Strengths of Ceanothus arboreus:

  • Sun loving drought tolerant plant
  • Scented blossom
  • All round tough plant suitable for problem areas
  • Ideal for fast growing screening
  • Evergreen foliage for all year round colour and screening
  • Suitable for container growing
  • Architectural plant – ideal as a ‘stand out’ plant
  • Suitable for exposed coastal planting
  • Attractive form or foliage for all year interest
  • Tolerates full sun and sandy, drought-prone soils

Design & Plant Use for Ceanothus arboreus:

  • Tall summer flowering shrub suitable for back of border planting
  • Fast growing evergreen plant ideal for screening
  • Plant for extreme coastal screening

View all the plants listed in Genus Ceanothus

View other shrubs with dark blue flowers, or shrubs with lime green foliage

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