Elephant Ear (Xanthosoma robustum)

Elephant Ear

Xanthosoma robustum

Broad, glossy leaves unfurl like tropical shields, casting deep, lush shade. Herbaceous perennial foliage plant; common name: Elephant Ear.

Partial sun
2–3/week
Moderate
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Plant Needs

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Sunlight Bright indirect light is ideal; tolerate partial shade, but avoid direct midday sun which can scorch the large, delicate leaves
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Watering Keep soil consistently moist but not waterlogged; allow the top 2 cm of soil to dry slightly between waterings to prevent root rot
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Temperature Thrives in temperatures between 20–28°C; temperatures below 12°C will cause leaf yellowing and dormancy or plant death
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Characteristics

  • Leaf: Large, arrow-shaped (sagittate) glossy green leaves, 60–120 cm long, with prominent, raised veins
  • Stem: Thick, fleshy green petioles reaching up to 2 m tall, supporting the large foliage
  • Inflorescence: Pale yellow-green spathe enclosing a spadix (typical aroid flower structure), rarely produced in indoor cultivation
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Care Guide

Watering

Maintain evenly moist soil; increase watering frequency during hot, dry periods

Fertilization

Diluted balanced liquid fertilizer every 2 weeks. Avoid over-fertilizing, as this can cause leaf tip burn and nutrient buildup in the soil

Banana peel compost tea:Compost banana peels for 2–3 weeks, steep in water for 24 hours, dilute 1:20 with water, and apply as a root drench to support healthy leaf growth
Pruning
  • Remove yellow or damaged leaves at the base of the petiole to improve airflow and maintain plant appearance
  • Trim overcrowded petioles to reduce competition for light and prevent pest infestations
  • Cut back foliage to 10 cm above soil level if the plant enters dormancy during cool temperatures to encourage new growth in spring
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic; ingestion causes oral pain, drooling, vomiting, and difficulty swallowing

Humans: Contains calcium oxalate crystals; ingestion causes oral burning and swelling; contact may lead to mild skin irritation

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental foliage for tropical gardens and large indoor spaces; corms are edible only when fully cooked to neutralize toxic calcium oxalate crystals