Californian red alder (Alnus rubra)

Californian red alder (Alnus rubra) is a tree that can grow higher than 15m tall and 3m – 8m wide.

This plant has several common names including: Californian red alder, tag alder, Oregon alder or red alder.

This is a deciduous plant that takes 20-50 years to reach full maturity.

Plant profile

Common name: Californian red alder, tag alder, Oregon alder, red alder
Scientific name: Alnus rubra
Plant type: Trees
Habit: Columnar / Upright
Height: Higher than 15m
Spread: 3m – 8m
Foliage: Deciduous
Sunlight: Full Sun
Soil: Chalk, Clay, Loam, Sand
Moisture: Moist but well drained
Garden type: Architectural, Wildlife Gardens
Planting type: Hedging & Screens, Low Maintenance

Seasonal colors

How to plant Californian red alder (Alnus rubra) – brewbooks from near Seattle, USA, CC BY-SA 2.0, via Wikimedia Commons

Cultivation profiles – Growing Californian red alder (Alnus rubra) – image source