St Helena Olive (Nesiota elliptica)

St Helena Olive

Nesiota elliptica

A critically endangered island endemic, its glossy leaves hold quiet resilience. Evergreen small tree; common name: St Helena Olive.

Full sun
1–2/week
Moderate
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Plant Needs

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Sunlight Full sun to partial shade; tolerates mild coastal wind exposure
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Watering Water deeply when top 5 cm of soil is dry; drought-tolerant once established
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Temperature Thrives in mild subtropical temperatures; protect from frost below 5°C
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Characteristics

  • Leaf: Elliptical, glossy dark green leaves with smooth margins; opposite arrangement
  • Flower: Small, fragrant white flowers in axillary clusters
  • Stem/Bark: Smooth grey-brown bark on young stems; fissured with age
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Care Guide

Watering

Keep soil consistently moist during active growth

Fertilization

Apply diluted balanced feed once monthly. Use low-nitrogen feed to promote flowering and healthy foliage

Composted banana peel tea:Steep fully composted banana peels in water for 24 hours; dilute 1:20 for root drench; discard solids to prevent pests and odor
Pruning
  • Remove dead or damaged branches in late winter to maintain canopy shape
  • Thin overcrowded growth to improve airflow and light penetration
  • Avoid heavy pruning to preserve the tree's natural rounded form
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: No documented toxicity to cats per ASPCA

Humans: No documented toxicity to humans

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental tree; high conservation priority as a critically endangered endemic