Red Alder

Alnus Rubra

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Overview

Red Alder (Alnus rubra) is a deciduous tree native to the Pacific Northwest. It thrives in moist environments, quickly reaching 50-80 feet high with a 20-30 feet canopy spread. Noted for its smooth gray bark and serrated leaves, it features catkins and small cones. Alder enriches soil by fixing nitrogen, making it beneficial for companion plants. Ideal for creating natural screens or riparian buffers in landscape designs.

Sun Full, Half, ShadeWater Extra in Summer, MediumZones 8–10Climate Mediterranean, Temperate

Red Alder (Alnus Rubra) — It thrives in moist environments, quickly reaching 50-80 feet high with a 20-30 feet canopy spread

Culture

Sun: Full, Half, Shade
Water: Extra in Summer, Medium
USDA zones: 8–10

Shape & size

Mature height: 40–50 Ft.
Mature width: 30–40 Ft.

Classification

Family: Betulaceae
Climate: Mediterranean, Temperate

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Photos (42)

Red Alder (Alnus Rubra) — Noted for its smooth gray bark and serrated leaves, it features catkins and small cones; their ideal hardiness zones range from 4

Red Alder (Alnus Rubra) — It thrives in moist environments, quickly reaching 50-80 feet high with a 20-30 feet canopy spread; the bark develops a rugged

Red Alder (Alnus Rubra) — Red Alder (Alnus rubra) is a deciduous tree native to the Pacific Northwest; alder enriches soil by fixing nitrogen, making it

Red Alder (Alnus Rubra) — Alder enriches soil by fixing nitrogen, making it beneficial for companion plants; red Alder (Alnus rubra) is a deciduous tree native

Red Alder (Alnus Rubra) — The Red Alder (Alnus rubra) is a deciduous tree esteemed for its adaptability and rapid growth; the tree's leaves are notable for

Red Alder (Alnus Rubra) — Ideal for creating natural screens or riparian buffers in landscape designs; with a canopy width of roughly 20 to 30 feet

Red Alder (Alnus Rubra) — Often reaching heights between 40 and 70 feet; green and yellow flowers in the garden

Red Alder (Alnus Rubra) — with a canopy width of roughly 20 to 30 feet; ideal for creating natural screens or riparian buffers in landscape designs

Red Alder (Alnus Rubra) — this stately tree casts a gentle shade; red Alders are adorned with clusters of catkins

Red Alder (Alnus Rubra) — the bark develops a rugged; it thrives in moist environments, quickly reaching 50-80 feet high with a 20-30 feet canopy spread

Red Alder (Alnus Rubra) — Red Alders are adorned with clusters of catkins; this stately tree casts a gentle shade

Red Alder (Alnus Rubra) — suitable for understory plantings.<br><br>Its bark showcases hues of gray and white; gardeners should note their ability to fix

Red Alder (Alnus Rubra) — woody cones that persist through winter; tolerating a variety of soil conditions

Red Alder (Alnus Rubra) — The tree's leaves are notable for their ovate shape and serrated edges; the Red Alder (Alnus rubra) is a deciduous tree esteemed for

Red Alder (Alnus Rubra) — adding year-round interest; tree with green and yellow blooms

Red Alder (Alnus Rubra) — tolerating a variety of soil conditions; woody cones that persist through winter

Red Alder (Alnus Rubra) — though they have a particular affinity for moist; which can significantly enrich nutrient-poor soils

Red Alder (Alnus Rubra) — Their ideal hardiness zones range from 4 through 7; noted for its smooth gray bark and serrated leaves, it features catkins and small

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