American Crinum Lily (Crinum americanum)

American Crinum Lily

Crinum americanum

Its fragrant white blooms rise like delicate trumpets over sword-shaped foliage. Aquatic or wetland perennial bulb; common name: American Crinum Lily.

Full sun
3–5/week
Moderate
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Plant Needs

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Sunlight Full to partial sun; tolerates dappled shade in hot, arid climates to prevent leaf scorch
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Watering Keep soil consistently moist or submerged in shallow water up to 15 cm deep; avoid allowing the bulb to dry out completely
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Temperature Thrives in warm temperate to tropical conditions; tolerates brief light frosts if protected from freezing water
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Characteristics

  • Leaf: Long, strap-like, bright green leaves up to 1 m long, arching outward from central bulb
  • Flower: Fragrant, trumpet-shaped white flowers in umbels of 6–12 blooms, with pale pink stamens
  • Bulb: Large, fleshy underground bulb with thick, fibrous roots adapted to wet soils
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Care Guide

Watering

Maintain consistent soil moisture or 5–10 cm of standing water; top up water levels regularly

Fertilization

Diluted balanced liquid feed every 2 weeks. Avoid over-fertilizing to prevent excessive foliage growth that inhibits blooming

Banana peel compost tea:Soak fully composted banana peels in water for 24 hours, dilute 1:20 for root drench; avoid raw peels to prevent pest infestations and odor
Pruning
  • Remove spent flower stalks after blooming to redirect energy to bulb growth
  • Trim brown or damaged leaf tips to maintain a tidy appearance
  • Thin overcrowded bulb offsets in early spring to improve airflow and reduce competition
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic due to lycorine alkaloids; may cause gastrointestinal distress and lethargy

Humans: Ingestion causes mild oral irritation, nausea, or vomiting if large quantities are consumed

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Garden Uses & Culture

Culture: Symbolizes resilience and purity in wetland ecological landscapes

Usage: Ornamental wetland plant; provides shelter and foraging habitat for aquatic wildlife