Korean Mountain Ash
Sorbus alnifolia
Rosaceae · broadleaf deciduous tree · introduced
Last updated
Plant Profile
Size & Form
Height
40–50 ft
Spread
26 ft
Growth Rate
Fast
Site Requirements
Light
Full Sun to Part Shade
Soil Drainage
Moist
Soil pH
4.5-8.5
Water
Moderate
Drought Tolerance
Moderate
Hardiness
Zones 4a–8b
Ornamental Interest
Bloom Time
May
Fall Color
Brown
Origin
central China, Korea and Japan
Watch for this season
Cytospora CankerHigh
Peak Spore Production and Dispersal
Fire BlightHigh
Bloom Infection Window
RustHigh
Uredinial Stage (Summer)
AphidHigh
Peak Population & Dispersal
+ 2 more — see full disease and pest lists below
Diseases: Regionally Documented (5)
Pests: Regionally Documented (9)
Data Maturity Structured Multiple sources. Expert review underway.