Japanese Alder
Alnus japonica
Betulaceae · broadleaf · introduced
Quick Facts
Height
80 ft
Growth Rate
Fast
Light
Full Sun to Part Shade
Soil
Wet Tolerant
Water
High
Hardiness
Zone Zones 5a–8b
Bloom Time
March
Origin
far eastern Russia, China (Anhui
Diseases (11)
Armillaria ostoyae Armillaria Root Rot
Brown Leaf Blotch
Canker and Stem Diseases
Catkin Hypertrophy and Leaf Curl
Phytophthora cactorum Collar Rot
Drippy Dieback
Various fungi (Phyllosticta spp., Septoria spp., Cercospo... Leaf Spot
Neonectria ditissima Nectria Canker
Phytophthora spp. (P Phytophthora Root Rot
Podosphaera aphanis var. aphanis Powdery Mildew
Thekopsora minima and Naohidemyces vaccinii Rust