Thunberg Spirea
Spiraea thunbergii
Rosaceae · broadleaf deciduous shrub · introduced
Last updated
Plant Profile
Size & Form
Height
3–5 ft
Spread
6 ft
Growth Rate
Medium
Site Requirements
Light
Full Sun to Shade
Soil Drainage
Moist
Soil pH
4.5-8.5
Water
Moderate
Drought Tolerance
Moderate to high
Hardiness
Zones 4a–8b
Ornamental Interest
Bloom Time
April
Fall Color
Brown
Origin
Japan and China A few cultivars: 'Fujino Pink' - 3-5 ft (0
Watch for this season
Powdery MildewHigh
Active Conidial Spread
AphidHigh
Peak Population & Dispersal
Diseases: Regionally Documented (2)
Pests: Regionally Documented (3)
Cultivars (2)
'Fujino Pink'
Common name: Fujino Pink Spirea; Mature height: 3–5 ft
Hardy to USDA Zone 4
'Mellow Yellow'
Common name: Mellow Yellow Spirea, Ogon (Thunberg) Spirea; Mature height: 3–5 ft
Hardy to USDA Zone 4
Data Maturity Structured Multiple sources. Expert review underway.