Crown Imperial (Fritillaria imperialis)

Crown Imperial

Fritillaria imperialis

Towering blooms crown atop whorled foliage, regal and striking. Bulbous flowering perennial; common name: Crown Imperial.

Full sun
1–2/week
Moderate
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Plant Needs

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Sunlight Full sun to partial shade; prefers bright, direct sunlight for optimal flowering, with protection from intense midday sun in hot climates
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Watering Water thoroughly when the top 5cm of soil is dry; avoid waterlogging to prevent bulb rot
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Temperature Hardy to -10°C; requires cool, dry conditions during summer dormancy to support healthy bulb regrowth
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Characteristics

  • Leaf: Whorled, lance-shaped, glossy green leaves clustered below the flower head
  • Flower: Bell-shaped, downward-facing blooms in shades of orange, yellow, or red; strong, musky scent
  • Stem: Thick, upright green stem supporting a terminal cluster of flowers
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Care Guide

Watering

Keep soil consistently moist during active growth; reduce watering as foliage begins to die back

Fertilization

Apply balanced bulb fertilizer at shoot emergence. Use a low-nitrogen fertilizer to promote bulb development rather than foliage growth

Eggshell powder topdress:Crush dried eggshells into fine powder; sprinkle 1 tbsp per bulb in early spring, avoiding direct contact with the bulb tissue to prevent irritation
Pruning
  • Remove spent flower heads after blooming to redirect energy to bulb growth
  • Cut back yellowing foliage once it has fully died back in late spring
  • Thin overcrowded bulbs every 3–4 years in autumn to maintain plant vigor
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Toxicity

Warning: this plant may be toxic.

Pets & Humans

Pets: ASPCA: Toxic due to alkaloid content; may cause vomiting, diarrhea, abdominal pain, and lethargy

Humans: Ingestion causes mild gastrointestinal upset including nausea and vomiting

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Garden Uses & Culture

Culture: Symbolizes royalty and majesty in traditional European garden design

Usage: Ornamental garden plant; cut flower for formal floral arrangements