Water Gum (Tristaniopsis laurina)

Water Gum

Tristaniopsis laurina

Its glossy leaves hold rain like scattered mirrors, a quiet evergreen beauty. Small ornamental tree; common names: Water Gum, Kanooka.

Full sun
1–2/week
Beginner
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Plant Needs

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Sunlight Full sun to partial shade; tolerates coastal salt spray and mild wind exposure
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Watering Water deeply and infrequently; drought-tolerant once established; avoid waterlogged soil
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Temperature Hardy to light frosts (down to 5°C); thrives in warm temperate to subtropical climates
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Characteristics

  • Leaf: Opposite, elliptical to lanceolate, glossy dark green with paler undersides; aromatic when crushed.
  • Flower: Clusters of small, fluffy yellow flowers with prominent, feathery stamens.
  • Stem/Bark: Smooth, mottled brown and grey bark that peels in thin, papery layers as the tree matures.
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Care Guide

Watering

Water regularly during establishment; reduce frequency once roots are established

Fertilization

Apply slow-release balanced fertilizer to support new growth. Do not fertilize in winter when growth is dormant

Eggshell powder topdressing:Sprinkle finely ground, dried eggshells on the soil surface; avoid direct contact with stems to reduce fungal growth risk
Pruning
  • Prune lightly after flowering to maintain a compact, rounded shape
  • Remove dead, damaged, or crossing branches in late winter to improve airflow
  • Thin dense inner growth to allow more light penetration to lower foliage
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: No documented toxicity to cats

Humans: No known toxicity to humans

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental tree for gardens, street planting, and coastal landscapes; aromatic foliage used in floral arrangements