Sword-leaf Oncidium (Oncidium ensatum)

Sword-leaf Oncidium

Oncidium ensatum

Its sword-shaped leaves frame sprays of dancing yellow blooms. Epiphytic orchid; common name: Sword-leaf Oncidium.

Partial sun
1–2/week
Moderate
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Plant Needs

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Sunlight Bright indirect light; avoid direct midday sun to prevent leaf scorch; tolerate partial shade
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Watering Water thoroughly when the orchid potting medium is nearly dry; avoid standing water in saucers to prevent root rot
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Temperature Thrives in warm, humid conditions; avoid temperatures below 12°C to prevent cold damage
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Characteristics

  • Leaf: Linear, sword-shaped, rigid dark green foliage, up to 30 cm long
  • Flower: Small bright yellow blooms with brown markings, arranged in branching sprays
  • Pseudobulb: Oval, fleshy structure that stores water and nutrients
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Care Guide

Watering

Keep potting medium slightly moist; increase humidity via daily misting

Fertilization

Diluted balanced orchid fertilizer every 2 weeks. Cease fertilization during autumn and winter dormancy

Banana peel tea:Soak fully composted banana peels in water for 3 days; dilute 1:20 for root drench; avoid raw peels to prevent mold growth
Pruning
  • Trim spent flower spikes at the base after blooming to redirect energy to pseudobulb growth
  • Remove yellowing or dead leaves to maintain plant health and airflow
  • Thin overcrowded pseudobulbs during spring repotting to reduce competition for resources
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA verified: Non-toxic to cats; no known toxicity risks

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

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental houseplant; cut flower arrangement