Korean Mountainash (Sorbus alnifolia)-Hort Answers - University of Illinois Extension
University of Illinois Extension

University of Illinois Extension

Hort Answers

Tree

Korean Mountainash
Sorbus alnifolia

Korean Mountainash flowers
Korean Mountainash flowers
 
Features
Small clusters of white flowers in late spring; red-orange berries in late summer and autumn; gold to orange fall color. 
 
Culture
Full sun; moist, well drained soil; tolerates alkaline soil. 
 
Cultivars
'Redbird' has red fruit and a columnar form. 
 
Mature Height
40-50 Feet
 
Size
Medium
 
 
Mature Form
Oval to rounded 
 
Native To:
China, Korea and Japan 
 
USDA Hardiness Zone
5 - 7 
 
Soil Conditions
Moist, Well-Drained
 
 
Tolerance
Alkaline Soil
 
 
Exposure/Light Requirements
Full Sun
 
 
Uses
Shade
Specimen
 
 
Foliage Color
Green
 
 
Fall Foliage Color
Orange
Yellow
 
 
Pests and Problems
 
Additional Notes
Most species of mountainash are very suscptible to borer; this species shows good resistance to that pest. Leaves are simple (mountainashes usually have compound leaves).

 

 
Related Resources
Home, Yard & Garden Pest Guide
Illinois Commercial Landscape and Turfgrass Pest Management Handbook
U of IL - Distance Diagnosis through Digital Imaging
U of IL - Plant Clinic