Fritillaria imperialis

Crown Imperial

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Striking bulbous perennial with bell-shaped flowers on tall stems, surrounded by whorled leaves.
yard Outdoor plants wb_sunny Half-shade / Sun pets Not pet-safe
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Plant Details

Common Name Crown Imperial
Family Liliaceae
Genus Fritillaria
Species Imperialis
Origin Central Asia / Mediterranean
Blooming Spring, late winter to early spring
Leaf Color Blue-green, glaucous
Sunlight Half-shade / Sun
Category Outdoor plants
Pet Friendly close No
yard

Care & Maintenance

terrain
Soil

Well-drained sandy loam with organic matter; bulbs rot in heavy clay or waterlogged soil.

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Watering

Water regularly during active growth; allow soil to dry completely during summer dormancy.

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Sunlight & Care

Full sun for strong stems and blooms; tolerate partial shade in hotter climates.

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Fertilization

Apply bulb fertilizer at planting and when shoots appear in spring.

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Pruning

Cut back foliage after yellowing to allow bulbs to store energy for next season.

Pest Control Aphid Bulb Mite Slug Snail

These are the insects and pathogens that commonly interact with this plant, including pests, parasites, and organisms typically associated with its care.

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Seasonal Periods

local_florist Flowering Period 2 months
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
eco Leaf Persistence 4 months
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
thermostat

Growing Parameters

thermostat
Temperature
41° – 77°
Fahrenheit
Ideal ambient air temperature range for healthy growth
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Humidity
30% – 70%
% relative
Optimal relative air humidity the plant thrives in
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Light (LUX)
1500 – 30000
Lux
Ambient illuminance level at the plant's surface
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Light (PAR)
800 – 2500
mmol/m²/s
Photosynthetically active radiation (PAR) intensity
water
Soil Moisture
10% – 50%
% volumetric
Water content in the growing medium
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Soil EC
200 – 800
mS/cm
Electrical conductivity (nutrient concentration in soil water)

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