Buckbrush (Ceanothus cuneatus)

Buckbrush

Ceanothus cuneatus

Its tiny blue blooms carpet branches like a summer sky burst. Evergreen drought-tolerant shrub; common names: Buckbrush, Wedgeleaf Ceanothus.

Full sun
0–1/week
Moderate
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Plant Needs

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Sunlight Full sun to partial shade; tolerates reflected heat in arid inland regions
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Watering Drought-tolerant once established; water deeply only during prolonged dry spells to avoid root rot
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Temperature Hardy to freezing winter temperatures; withstands summer heat up to 38°C with well-drained soil
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Characteristics

  • Leaf: Small, wedge-shaped (obovate-cuneate), leathery, dark green with rolled margins, 0.5–2 cm long.
  • Flower: Clusters of tiny, fragrant pale blue to deep blue flowers, forming dense panicles 2–5 cm long.
  • Stem: Woody, branching stems with reddish-brown bark that peels with age.
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Care Guide

Watering

Water deeply every 2–3 weeks during the first growing season; reduce to monthly once fully established

Fertilization

Apply a thin layer of well-composted organic matter in early spring. Avoid high-nitrogen fertilizers as they can reduce flowering

Composted eggshell powder:Sprinkle a thin layer around the base of the shrub in early spring; avoid direct contact with foliage to prevent burning
Pruning
  • Prune lightly immediately after flowering to maintain compact shape and encourage new growth for next season's blooms
  • Remove dead, damaged, or crossing branches in late winter to improve airflow and reduce disease risk
  • Avoid heavy pruning as it may reduce flowering in subsequent years
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Non-toxic to cats

Humans: No known toxicity to humans

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental xeric landscaping, erosion control, pollinator habitat for bees and butterflies