Canary Islands Juniper (Juniperus cedrus)

Canary Islands Juniper

Juniperus cedrus

Its silvery-blue foliage carries mountain calm, a slow-growing evergreen conifer. Common name: Canary Juniper.

Full sun
1–2/week
Moderate
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Plant Needs

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Sunlight Full sun exposure for optimal silvery-blue foliage color; tolerates partial shade but may lose vibrant foliage tone
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Watering Drought-tolerant once established; water deeply and infrequently to avoid root rot, reduce watering during rainy or cold periods
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Temperature Hardy to -5°C; tolerates high summer temperatures with well-drained soil; protect from harsh winter winds in cold regions
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Characteristics

  • Foliage: Silvery-blue scale-like leaves in dense whorls; aromatic when crushed
  • Cones: Female cones are small, berry-like, green ripening to brown over 2–3 years
  • Stem/Bark: Reddish-brown, peeling bark on mature trunks
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Care Guide

Watering

Water deeply every 7–10 days during prolonged dry spells; reduce watering in rainy periods

Fertilization

Apply slow-release granular fertilizer once in early spring to support new growth. Avoid high-nitrogen fertilizers to prevent excessive, weak foliage growth

Eggshell powder topdressing:Crush baked, cooled eggshells into fine powder and mix into topsoil to improve drainage and add calcium; avoid overapplication to prevent soil alkalinity buildup
Pruning
  • Trim to maintain desired shape in late spring; avoid heavy pruning into old wood as it may not regrow
  • Remove dead, diseased, or crossing branches to improve airflow and reduce pest risk
  • Thin dense foliage to promote light penetration and maintain vibrant color
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Contains thujone; ingestion may cause vomiting, diarrhea, lethargy, and abdominal pain

Humans: Mild gastrointestinal upset if large quantities of foliage or berries are ingested

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Garden Uses & Culture

Culture: Symbolizes resilience and longevity in Canary Islands traditional folklore

Usage: Ornamental landscaping; essential oil production from aromatic foliage