Dichroa febrifuga

Blue Hydrangea / Chinese Indigo Root

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Deciduous shrub native to East Asia featuring striking blue hydrangea-like flowers and medicinal roots. Requires cool winter dormancy.
yard Outdoor plants wb_sunny Shade / Half-shade pets Not pet-safe
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Plant Details

Common Name Blue Hydrangea / Chinese Indigo Root
Family Hydrangeaceae
Genus Dichroa
Species Febrifuga
Origin China
Blooming Summer, blue or white flowers on terminal panicles
Leaf Color Dark green turning yellow in autumn before dropping
Sunlight Shade / Half-shade
Category Outdoor plants
Pet Friendly close No
yard

Care & Maintenance

terrain
Soil

Rich, acidic to neutral, well-drained loam with organic matter

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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 morning sun and afternoon shade in hot climates; partial shade generally ideal for foliage color

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Fertilization

Apply balanced liquid fertilizer monthly from April to September during active growth phase

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Pruning

Prune after flowering or in late winter; remove dead wood and shape for air circulation

Pest Control Aphid Mealybug 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 3 months
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
agriculture Harvesting Period 3 months
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
eco Leaf Persistence 8 months
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
thermostat

Growing Parameters

thermostat
Temperature
41° – 86°
Fahrenheit
Ideal ambient air temperature range for healthy growth
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Humidity
40% – 80%
% relative
Optimal relative air humidity the plant thrives in
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Light (LUX)
1500 – 25000
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
25% – 70%
% volumetric
Water content in the growing medium
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Soil EC
300 – 1800
mS/cm
Electrical conductivity (nutrient concentration in soil water)

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