Spiraea thunbergii

Thunberg's Spirea

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Graceful deciduous shrub with arching branches and abundant white spring flowers. Native to East Asia, popular for temperate gardens.
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Plant Details

Common Name Thunberg's Spirea
Family Rosaceae
Genus Spiraea
Species Thunbergii
Origin Japan, Korea, China
Blooming Spring (April-May), white flowers
Leaf Color Light green, yellow-green in autumn
Sunlight Half-shade
Category Outdoor plants
Pet Friendly check Yes
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Care & Maintenance

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Soil

Well-drained loamy soil, adaptable to various pH levels including clay and sandy textures.

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Watering

Moderate watering during establishment, drought tolerant once mature; avoid waterlogging.

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Sunlight & Care

Full sun for best flowering, tolerates partial shade but flowers may be reduced.

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Fertilization

Apply balanced granular fertilizer in early spring before blooming cycle begins.

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Pruning

Prune immediately after flowering to maintain shape and encourage new growth for next season.

Pest Control Aphid Mealybug 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 2 months
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
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Growing Parameters

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Temperature
-4° – 95°
Fahrenheit
Ideal ambient air temperature range for healthy growth
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Humidity
30% – 80%
% relative
Optimal relative air humidity the plant thrives in
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Light (LUX)
1500 – 60000
Lux
Ambient illuminance level at the plant's surface
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Light (PAR)
100 – 2500
mmol/m²/s
Photosynthetically active radiation (PAR) intensity
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Soil Moisture
20% – 70%
% volumetric
Water content in the growing medium
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Soil EC
300 – 1500
mS/cm
Electrical conductivity (nutrient concentration in soil water)
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Common Problems

Something wrong with your Spiraea thunbergii? Select a symptom to diagnose and fix the issue.

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