Feltleaf Ceanothus (Ceanothus arboreus)

Feltleaf Ceanothus

Ceanothus arboreus

It blooms in cloud-like blue clusters, a burst of coastal California charm. Evergreen flowering shrub; common name: California Lilac.

Full sun
1/week
Moderate
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Plant Needs

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Sunlight Full sun to partial shade; tolerates coastal wind and drought once established
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Watering Deep, infrequent watering; allow soil to dry completely between waterings
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Temperature Hardy to mild frost; prefers cool coastal temperatures, tolerates brief heatwaves
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Characteristics

  • Leaf: Oval, fuzzy gray-green leaves with rolled margins, 2–5 cm long
  • Flower: Dense terminal clusters of tiny, fragrant blue to lavender flowers
  • Stem/Bark: Woody, reddish-brown stems with smooth young bark, becoming fissured with age
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Care Guide

Watering

Deep water every 7–10 days during active growth

Fertilization

Light feed once at bud break. Use low-nitrogen fertilizer to promote flowering without excessive foliage growth

Eggshell powder topdress:Crushed, baked eggshells sprinkled on soil surface; no dilution needed, avoids root burn
Pruning
  • Prune lightly after flowering to maintain shape and encourage new growth
  • Remove dead or damaged branches in late winter to improve airflow
  • Avoid heavy pruning, as it can reduce flowering in subsequent seasons
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Non-toxic to cats

Humans: No known toxic effects to humans

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Garden Uses & Culture

Culture: Symbolizes coastal resilience and California native pride

Usage: Ornamental garden shrub; pollinator habitat for bees and butterflies