Queensland Bottle Tree (Brachychiton rupestris)

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Sunlight Full sun to partial shade; tolerates intense direct sun in arid regions; partial shade may reduce trunk swelling

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Watering Drought-tolerant; water deeply but infrequently, allow soil to dry completely between waterings to avoid root rot

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Temperature Hardy to light frost (down to 5°C); prefers warm, arid to semi-arid climates; avoid prolonged exposure to temperatures below 5°C

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Leaf: Juvenile leaves are lobed; adult leaves are narrow, linear to lanceolate, glossy green
Flower: Bell-shaped, creamy-white to pale yellow, clustered at branch tips
Stem/Trunk: Distinctive swollen, bottle-shaped trunk for water storage; grey-brown, fissured bark

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Watering

Water deeply once every 2–3 weeks; allow soil to dry fully between waterings

Fertilization

Diluted balanced feed once every 2 months. Use low-nitrogen fertilizer to promote healthy trunk growth rather than excessive foliage

Banana peel compost tea：Fully compost banana peels, dilute 1:20 with water for root drench; avoid raw peels to prevent pest infestations and odor

Pruning

Remove dead or damaged branches in late winter to maintain structural integrity
Thin crowded inner branches to improve airflow and light penetration
Avoid heavy pruning; minimal trimming is needed to preserve the tree's natural bottle shape

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Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Non-toxic to cats; no reported toxic reactions

Humans: Non-toxic to humans; no known adverse health effects from ingestion or contact

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Culture: Symbolizes resilience and adaptation to drought in Australian indigenous cultural contexts

Usage: Ornamental specimen tree for arid gardens; lightweight timber used for woodcrafts