Latin: Alnus rhombifolia or A. incana
Plant type: Deciduous tree
Size: 40’-60’ x 30’
Light: Sun to partial shade
Water: Regular water
Family: Birch
Zone: 6 to 10
White Alder is a large, deciduous tree that grows naturally along rivers and streams. It grows quickly to 20’ tall, then more slowly until it reaches its height at maturity, from 40’-60’. [17] The straight trunk bears smooth, grey bark and tiered branches that protrude either straight out or angled slightly upward. The ribbed leaves are finely toothed, 2 ½”-4 ½” long, and dark green above, pale green below. Clusters of fragrant flower catkins form in late winter or early spring. The female flowers develop into cone-like structures in the fall that persist into the winter and attract birds. [25]
Alders tolerate heat and require ample moisture. Careful placement and deep watering of these beautiful shade trees will help to keep their water-seeking roots from being a nuisance. Due to nitrogen-fixing nodule on their roots, they tolerate soils low in nutrients. [39]
Go to Alder Main Page.