River Red Gum (Eucalyptus camaldulensis)

River Red Gum

Eucalyptus camaldulensis

Its peeling bark paints warm earth tones across sunlit banks. Fast-growing evergreen tree; common name: River Red Gum.

Full sun
1–2/week
Moderate
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Plant Needs

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Sunlight Requires full sun for optimal growth; tolerates partial shade but may develop sparse foliage in low-light conditions
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Watering Deep, infrequent watering to encourage deep root growth; drought-tolerant once established, avoid waterlogging
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Temperature Hardy to -10°C; thrives in warm, dry climates and withstands summer heatwaves
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Characteristics

  • Leaf: Juvenile leaves are round, opposite, and blue-green; adult leaves are lanceolate, glossy green, and aromatic when crushed
  • Flower: Creamy-white, fluffy brush-like inflorescences clustered at leaf axils
  • Bark: Sheds in long, fibrous strips, revealing pale pink to reddish-brown underbark that ages to gray
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Care Guide

Watering

Deep watering every 7–10 days during dry spells to maintain soil moisture

Fertilization

Apply slow-release granular fertilizer once in early spring to support new growth. Use a low-phosphorus fertilizer to prevent nutrient burn

Eggshell powder topdressing:Crush clean, dried eggshells into fine powder; sprinkle 1–2 tbsp around the base of the tree and water lightly to release calcium into the soil
Pruning
  • Remove dead, damaged, or crossing branches in late winter to maintain canopy structure
  • Thin overcrowded branches to improve airflow and reduce fungal disease risk
  • Avoid heavy pruning of mature trees, as eucalyptus may not regrow vigorously from old wood
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA confirmed toxic; contains eucalyptol which may cause vomiting, diarrhea, depression, or weakness

Humans: Ingestion may cause nausea, vomiting, or dizziness; essential oils can irritate skin and mucous membranes

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Garden Uses & Culture

Culture: Symbolizes resilience and connection to waterways in Australian Indigenous culture

Usage: Timber for construction and firewood; essential oil production for aromatherapy and cleaning products