About
Alnus glutinosa 'Laciniata' is a sizable, typically multi-stemmed tree commonly found near riverbanks. Its leaves are thick and green, featuring pronounced indentations between the veins that create narrow lobes. The foliage remains green through the fall without any significant autumn coloration. In winter, the tree showcases upright catkins that are deep red, adding a subtle vibrancy to the landscape. Female flowers emerge as small clusters that mature into durable, woody cones.
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
- Chalk, Clay, Loam, Sand
- 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
- Needs good light, permanently damp soil but very little fertility as they have nitrogen-fixing nodules on their roots. They are used for river bank stabilisation and other land reclamation purposes
- Pruning
- Pruning group 1
- Propagation
- Grow from seed or hardwood cuttings
- Pest resistance
- May be susceptible to alder sucker and leaf-mining sawflies
- Disease resistance
- May be susceptible to Phytophthora and honey fungus