Dumb Cane (Dieffenbachia seguine)

Dumb Cane

Dieffenbachia seguine

Its broad leaves hold silent danger beneath lush green. Evergreen foliage plant; common name: dumb cane.

Partial sun
1–2/week
Beginner
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Plant Needs

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Sunlight Bright indirect light; avoid direct midday sun which can scorch leaves; tolerates low light for short periods
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Watering Water when the top 2–3 cm of soil feels dry; avoid overwatering to prevent root rot
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Temperature Thrives at 18–27℃; protect from temperatures below 12℃ to prevent leaf yellowing and tissue damage
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Characteristics

  • Leaf: Large ovate to elliptical leaves with variegated green and cream/white patterns; glossy, leathery texture
  • Stem: Thick, fleshy upright stem with visible leaf scars marking previous growth
  • Inflorescence: Pale green spathe enclosing a narrow spadix (rarely blooms indoors)
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Care Guide

Watering

Keep soil evenly moist but not waterlogged

Fertilization

Diluted balanced liquid feed every 2 weeks. Avoid over-fertilizing to prevent leaf tip burn; cease feeding in winter

Banana peel compost tea:Use fully composted banana peels; dilute 1:20 with water for root drench to support healthy leaf growth without causing fertilizer burn
Pruning
  • Remove yellow or damaged leaves at the base to improve airflow and plant appearance
  • Trim overgrown stems in early spring to encourage bushier, compact growth
  • Wipe leaves regularly with a damp cloth to remove dust and enhance light absorption
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic; calcium oxalate crystals cause severe oral pain, drooling, vomiting, and difficulty swallowing

Humans: Contains calcium oxalate crystals; ingestion causes oral irritation and temporary speech impairment; contact may trigger mild skin rash

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Garden Uses & Culture

Culture: N/A

Usage: Ornamental indoor foliage plant; rarely used in traditional folk medicine