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Red Alder

Red Alder

Alnus rubra

tree☀️ full sun💧💧💧 high waterZone 4bZone 9b

A fast-growing native deciduous tree with reddish catkins in early spring and dark green foliage. Red alder thrives in wet or riparian areas and is valuable for wildlife and nitrogen fixation.

Overview

Form
Pyramidal
Growth Rate
fast
Size
40–90′ tall × 30–50′ wide
Dormancy
deciduous

Tolerances & Soil

moderate

Flood Tolerance

low
Zone 4bZone 9b
1471013
ColderWarmer
Zone range: Zone 4b to Zone 9b

pH Range

4.37.3
7.0
3.556.589
pH range: 4.3 to 7.3

Soil Texture

Coarse, Medium, Fine

Seasonality

Bloom Season

J
F
M
A
M
J
J
A
S
O
N
D

Season of Interest

Spring

Sub-canopy

Smaller trees living beneath the canopy.

Succession Role

pioneerearly successional

Native to the United States

Native Range

Pacific Northwest North America

Native to: California, Oregon, Washington

Function & Care

biomass/mulchdynamic accumulatorerosion controlnitrogen fixerwildlife benefitwindbreak
Nitrogen Fixer · High

Establishment & Care

Establishment
easy
Maintenance
low
Propagation
seed, cutting, sucker