common alder
Also known as: aar; aller; black alder; European alder
A deciduous tree to 25m, broadly conical in habit when young, with grey-purple buds and young catkins conspicuous in winter, and rounded bright green leaves
Scientific classification
- Species
- common alder (Alnus glutinosa)
- Genus
- Alnus
- Family
- Betulaceae
- Information to be completed
- Toxicity
- Trees
- Plant type
- Higher than 12 metres
- Height
- 4-8 metres
- Spread
- Deciduous
- Foliage
- Columnar upright
- Habit
- Spring · Summer · Autumn
- Season of interest
- Full sun
- Sunlight
- Information to be completed
- Ideal temperature
common alder pictures
Distribution of common alder
Distribution map
- Native
- Introduced
- Cultivated
Source：WCVP v16 · Royal Botanic Gardens, Kew · CC BY 3.0 · Boundaries：WGSRPD / TDWG
Culture
Information to be completed
Toxicity
Information to be completed
Quick identification of common alder
Information to be completed
common alder care guide
- Moderate regular watering, allowing brief slight drying between soakings
- Watering
- Full sun
- Sunlight
- Information to be completed
- Ideal temperature
Watering
Moderate regular watering, allowing brief slight drying between soakings
Fertilizing
FertilizingBalanced perennial feed every four weeks from spring through summer
Pruning
PruningLittle pruning is needed. Remove diseased, damaged, crowded or crossing shoots and unwanted growth. Timing depends on the plant: generally late winter or early spring; plants prone to bleeding and deciduous magnolias need different timing, and deciduous azaleas and lilacs are pruned after flowering.
Propagation
PropagationPropagate by seed or hardwood cuttings
Growing
GrowingThis genus is noted for its ability to thrive in poor, wet conditions and is widely used in land reclamation
People also ask
Information to be completed
Common pests and diseases
Diseases
May be susceptible to Phytophthora and honey fungus
Pests
May be susceptible to alder sucker and leaf-mining sawflies
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