Red Spider Lily (Lycoris radiata)

Red Spider Lily

Lycoris radiata

Crimson blooms burst like spider legs in autumn, a dramatic late-season spectacle. Deciduous bulbous perennial; common name: Red Spider Lily.

Partial sun
1/week
Moderate
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Plant Needs

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Sunlight Bright indirect to partial sunlight; blooms best with moderate daily sun exposure, avoid intense midday summer sun that may scorch foliage.
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Watering Water thoroughly when the top 5 cm of soil is dry; avoid overwatering to prevent bulb rot, especially during dormancy.
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Temperature Hardy to -10°C; thrives in cool to temperate conditions, protect from prolonged temperatures above 30°C during summer dormancy.
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Characteristics

  • Leaf: Linear, dark green, strap-shaped leaves emerge in winter and die back in spring.
  • Flower: Umbel of 4–6 crimson, spider-like blooms with long, reflexed petals.
  • Bulb: Round, tunicated underground bulb containing toxic alkaloids.
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Care Guide

Watering

Keep soil slightly moist during winter and spring leaf growth phase

Fertilization

Apply diluted balanced liquid fertilizer once monthly during leaf growth. Use a low-nitrogen fertilizer to promote bulb health rather than foliage growth.

Eggshell powder topdress:Sprinkle finely ground, dried eggshells on the soil surface around bulbs; avoid direct contact with bulb tissue to prevent irritation.
Pruning
  • Remove spent flower stalks immediately after blooming to redirect energy to bulb development.
  • Trim yellowing, dying leaves in late spring as they naturally senesce, avoiding damage to the bulb.
  • Thin overcrowded bulbs every 3–4 years in late summer to improve air circulation and blooming performance.
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic due to lycorine; ingestion may cause vomiting, diarrhea, abdominal pain, lethargy, tremors, and potentially life-threatening cardiac complications.

Humans: Contains lycorine alkaloids; ingestion causes gastrointestinal distress, with severe cases potentially leading to convulsions or respiratory issues.

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Garden Uses & Culture

Culture: In Japan, associated with death and the afterlife, traditionally planted in cemeteries to guide spirits.

Usage: Ornamental garden plant for late-season color; used in cut flower arrangements for dramatic visual appeal.