Calycanthus occidentalis

Western Spicebush

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A deciduous shrub native to western North America, prized for fragrant brownish-red flowers and aromatic foliage that turns yellow in autumn.
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Plant Details

Common Name Western Spicebush
Family Calycanthaceae
Genus Calycanthus
Species Occidentalis
Origin Western North America
Blooming Late spring to early summer, occasionally rebloates in fall
Leaf Color Green turning yellow/orange before dropping
Sunlight Half-shade
Category Outdoor plants
Pet Friendly close No
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Care & Maintenance

terrain
Soil

Moist, well-drained acidic to neutral loam; tolerates clay but dislikes drought.

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Watering

Keep soil consistently moist during growing season. Reduce watering significantly during winter dormancy.

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Sunlight & Care

Prefers full sun for maximum fragrance and bloom production; tolerates partial shade in hot climates.

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Fertilization

Apply balanced slow-release fertilizer in early spring before new growth emerges.

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Pruning

Prune lightly after flowering to shape; remove dead wood and suckers in late winter while dormant.

Pest Control Aphid Japanese Beetle Scale Insect Spider Mite

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 1 month
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
eco Leaf Persistence 9 months
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
thermostat

Growing Parameters

thermostat
Temperature
5° – 95°
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)
4000 – 12000
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
20% – 65%
% volumetric
Water content in the growing medium
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Soil EC
400 – 1800
mS/cm
Electrical conductivity (nutrient concentration in soil water)

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