Japanese alder
Alnus japonica
USDA zones5 to 7
SunHandles full sun to partial sun
WaterHandles moderate or wet soil
Size40 to 60 feet tall30 to 50 feet wide
- Habit
- Pyramidal
- Bloom season
- Spring
- Bloom color
- Yellow-brown (male) and purplish (female)
- Foliage color
- Green
Garden uses
Notes
Japanese alder (Alnus japonica) is a tree for shade gardens and woodland settings. It is hardy to USDA zone 5, or down to -20°F (-29°C). This plant likes full or part sun and average to wet soil. It grows in a pyramidal shape and reaches 40 to 60 feet tall. Yellow-brown male catkins and purplish female catkins appear in early to late spring.
Pairs well with River birch, Christmas fern, Japanese forest grass, and Oakleaf hydrangea.
Native range
Japan, Korea, and Manchuria.