red alder
Also known as: Californian red alder; Oregon alder; tag alder
A medium-sized tree, to around 19m, fast-growing with a graceful habit, producing a narrow pyramidal head with rather pendulous branches. Leaves large, lobed, dark green above, greyish beneath. Long male catkins to 15cm. Fruits barrel-shaped, to 1.5cm long
Scientific classification
- Species
- red alder (Alnus rubra)
- 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
red alder pictures
Distribution of red alder
Distribution map
Alaska to California
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Culture
Information to be completed
Toxicity
Information to be completed
Quick identification of red alder
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red 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
PruningRequires minimal pruning
Propagation
PropagationPropagate by seed in a seedbed as soon as ripe. Root hardwood cuttings in winter and softwood cuttings in summer. Bud grafting can be performed in late summer
Growing
GrowingThis genus is noted for its ability to thrive in poor, wet conditions and is widely used in land reclamation
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Common pests and diseases
Diseases
May be susceptible to Phytophthora and honey fungus
Pests
Generally pest-free
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