About
Alnus nepalensis is a rapidly growing deciduous tree that can reach heights of up to 30 meters. Its leaves are a deep green on the upper side and lighter underneath, measuring around 18 centimeters in length, and they do not change color in the fall. In autumn, long cream-colored male catkins appear, hanging in large clusters. The female cones, which are woody, form later and are positioned upright in clusters on the bare branches.
About the genus
Alnus comprises robust deciduous trees and sizable shrubs characterized by their rounded foliage and, during winter, noticeable catkins.
Growing conditions
- Sunlight
- Full sun, Partial shade
- Soil type
- Clay, Loam
- Soil pH
- Acid, Alkaline, Neutral
- Soil moisture
- Poorly-drained
- Aspect
- East-facing, North-facing, South-facing, West-facing
- Exposure
- Exposed, Sheltered
- UK hardiness
- H7
Plant details
- Plant type
- Trees
- Habit
- Columnar upright, Spreading branched
- Foliage
- Deciduous
- Height
- Higher than 12 metres
- Spread
- wider than 8 metres
- Time to full height
- 20-50 years
- Suggested uses
- Architectural
Care notes
- Cultivation
- It is a nitrogen-fixer so can grow on poor soil. Suited to river banks on permanently damp soil in good light. For more information see tree cultivation.
- Pruning
- Pruning group 1
- Propagation
- Propagate by harwood cuttings or seed. For more advice see our information on how to propagate from seed (tree/shrub
- Pest resistance
- May be susceptible to alder leaf beetle, alder sucker and leaf-mining sawflies
- Disease resistance
- May be susceptible to phytophthora root rot and honey fungus