Purple Sword Alocasia (Alocasia lauterbachiana)

Purple Sword Alocasia

Alocasia lauterbachiana

Its upright purple-tinged leaves cut sharp silhouettes like tropical blades. Evergreen foliage plant; common name: Purple Sword Alocasia.

Partial sun
1–2/week
Moderate
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Plant Needs

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Sunlight Bright indirect light; avoid direct midday sun which can scorch leaf edges
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Watering Water thoroughly when the top 2–3 cm of soil is dry; avoid waterlogging to prevent root rot
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Temperature Thrives at 18–26℃; avoid temperatures below 15℃ which can trigger leaf yellowing and stunted growth
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Characteristics

  • Leaf: Upright, sword-shaped leaves with dark green upper surface and deep purple undersides; leathery texture.
  • Stem: Short, thick rhizomatous stems with purple tinges.
  • Inflorescence: Spathe and spadix (rare indoors, pale green spathe).
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Care Guide

Watering

Keep soil consistently moist but not soggy; mist foliage 2–3 times weekly to boost humidity

Fertilization

Diluted balanced liquid feed every 2 weeks. Cease fertilization in autumn and winter when growth slows

Composted banana peel tea:Soak fully composted banana peels in water for 24 hours; dilute 1:20 for root drench; discard solid debris to avoid pest infestations and odors
Pruning
  • Remove yellowing or damaged leaves at the base to maintain plant health and appearance
  • Trim overcrowded rhizomes during spring repotting to control clump size
  • Wipe leaves regularly with a damp cloth to remove dust and improve photosynthetic efficiency
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic; may cause drooling, vomiting, oral pain

Humans: Contains calcium oxalate crystals; ingestion causes oral irritation, prolonged contact may cause mild skin itch

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental foliage for indoor tropical displays and shaded outdoor garden beds in warm climates