Santa Barbara Ceanothus (Ceanothus impressus)

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Sunlight Full sun to partial shade; tolerates coastal wind and drought once established

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Watering Drought-tolerant after rooting; water deeply only during prolonged summer dry spells

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Temperature Hardy to -5°C; withstands hot coastal summers and cool winters without frost damage

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Leaf: Small glossy dark green leaves with impressed veins, oval shape, rolled-under margins
Flower: Dense terminal clusters of tiny sky-blue to lavender fragrant blooms
Stem: Woody branching stems with smooth grayish-brown mature bark

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Watering

Water deeply once every 2-3 weeks during extended dry periods

Fertilization

Light application of low-nitrogen fertilizer in early spring. Over-fertilization can reduce flower production and increase susceptibility to disease

Eggshell powder topdress：Sprinkle a thin layer around the shrub base in early spring; avoid direct contact with stems to prevent potential burn

Pruning

Remove spent flower clusters immediately after blooming to promote bushier growth
Thin crowded interior branches in late spring to improve airflow and light penetration
Cut back overgrown stems by one-third every 2-3 years to maintain compact mounding form

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Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA-verified non-toxic to cats; no reported toxicity

Humans: Non-toxic to humans; no known adverse health effects from ingestion or contact

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Culture: Symbolizes coastal California native biodiversity; popular in water-wise sustainable landscaping

Usage: Ornamental garden shrub; erosion control on coastal slopes