Candlebark Gum (Eucalyptus rubida)

Candlebark Gum

Eucalyptus rubida

Its smooth peeling bark glows like candle wax in sunlight. Evergreen tree; common name: candlebark eucalyptus.

Full sun
1–2/week
Moderate
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Plant Needs

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Sunlight Full sun to partial shade; thrives in open, sunny locations and tolerates light shade in hot summer climates
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Watering Water deeply but infrequently; allow the top 15–20 cm of soil to dry completely between waterings to prevent root rot
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Temperature Hardy to -10°C once established; protect young saplings from prolonged frost; tolerates summer heat up to 35°C with adequate water
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Characteristics

  • Leaf: Juvenile leaves are round, blue-green; adult leaves are lanceolate, glossy dark green with a faint blue tinge
  • Bark: Smooth, creamy white to pale yellow, peeling in thin, papery strips to reveal fresh, lighter bark underneath
  • Flower: Clusters of small, fluffy white inflorescences; buds are spherical with a conical cap before blooming
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Care Guide

Watering

Water deeply every 7–10 days; increase frequency to every 5 days during extended heatwaves

Fertilization

Apply slow-release, low-phosphorus fertilizer once in early spring. Do not fertilize mature trees unless showing signs of nutrient deficiency

Banana peel compost tea:Compost banana peels for 2–3 weeks, steep in water for 24 hours, dilute 1:20 with water for root drench; discard solid peels to avoid pest attraction and odor
Pruning
  • Remove dead, damaged, or crossing branches in late winter to improve airflow and structure
  • Thin dense upper foliage to allow light to reach lower branches and reduce wind resistance
  • Trim young saplings to maintain a compact, desired shape; avoid heavy pruning of mature trees as it can cause stress
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA-listed toxic; ingestion leads to vomiting, diarrhea, lethargy, excessive salivation, and potential central nervous system depression

Humans: Contains eucalyptus oil; ingestion causes mild gastrointestinal upset, mouth irritation; skin contact may trigger mild rash in sensitive individuals

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Garden Uses & Culture

Culture: Symbolizes resilience and renewal in Australian Indigenous cultural traditions, associated with healing properties of its oil

Usage: Ornamental shade tree; diluted eucalyptus oil from leaves used in aromatherapy and natural cleaning products