SafePlants

Ceanothus: The Californian Lilac

Ceanothus, commonly known as Californian Lilac, is a genus of beautiful shrubs or small trees prized for their vibrant blue, white, or pink flowers. They are a popular choice for gardens, especially in sunny and sheltered locations.

Considerations for Pets

• Ceanothus may be attractive to pets due to its flowers.

Taxonomy and Nomenclature

• Scientific Name: Ceanothus L.
• Common Name: Californian Lilac
• Family: Rhamnaceae
• The genus comprises about 50-60 species.

Distribution and Habitat

• Ceanothus is native to North America, particularly the western regions.
• They are well-suited to Californian landscapes.

Morphological Characteristics

• Ceanothus can be evergreen or deciduous shrubs or small trees.
• They typically grow to around 3 meters (10 feet) in height and spread.
• They are known for their small, oval, dark green leaves.

Ecological Role

• Ceanothus species are nitrogen-fixing plants.
• They are drought-tolerant once established and can quickly fill an empty space.

Quirky Facts

• The name "Ceanothus" is thought to be derived from an unknown plant mentioned by Theophrastus in ancient Greek texts.

Varieties and Cultivars

• Popular varieties include:
  • Ceanothus arboreus 'Trewithen Blue'
  • Ceanothus thyrsiflorus var. repens (creeping blue blossom)
  • Ceanothus 'Puget Blue'
  • Ceanothus 'Autumnal Blue'
  • Ceanothus 'Skylark'
  • Ceanothus 'Concha'
  • Ceanothus burkwoodii
  • Ceanothus griseus Yankee Point
  • Ceanothus 'Silver Surprise'
  • Ceanothus 'Victoria'

Further Information

• Gardeners' World offers expert gardening advice on planting Ceanothus.
• UC IPM provides information about managing pests of Ceanothus in gardens and landscapes.
• San Marcos Growers specializes in California Native Plants.
• David Fross and Dieter Wilken authored a book titled "Buy Ceanothus."