Alnus
Alnus cordata ITALIAN ALDER
Dark-green, glossy leaves along with the overall form of this tree make it a handsome addition to any landscape. This is a fast growing, deciduous tree with an upright, pyramidal growth habit. Tree grows to a height of 40' high and a spread of 25'. Italian Alder is tolerant of wet soils making it a good choice in areas with high supplemental moisture. USDA: 5-9 Sunset: 3-9, 14-24, 30-33
Alnus glutinosa BLACK ALDER
This tree has very dense foliage making it the perfect choice as a screen. Black Alder is a deciduous tree that generally reaches 70' high and spreads 35'. Leaves are oval in shape, have a toothed margin and measure 3-5 inches long. Bark is silvery gray and shows interesting scars that look like "eyes" when mature. This tree is not a fast grower like Alnus rhombifolia , which may be an advantage in certain situations. USDA: 3-9 Sunset: 1-10, 14-24, 30-43
Alnus oregona RED ALDER
This is a beautiful tree that is native to wet, low-lying areas of the Pacific Northwest . The growth of this deciduous tree is very fast eventually reaching 50-60' high and 30-35' wide. Dark green leaves measure 2-4 inches long and have hairy, rust colored undersides. Leaf edges are rolled under giving them an unusual look. This tree does better when planted near the coast. USDA: 7-10 Sunset: 3-7, 14-17
Alnus rhombifolia WHITE ALDER
This Alder is extremely fast growing and takes on a pyramidal, spreading habit as it matures. A deciduous tree by nature, it can reach 80' high with a 40' spread. Dense, dark green leaves are finely serrated and measure 4 inches long. Tree is native to California where it grows naturally near stream banks. This fact makes it a good choice for planting in turf where supplemental moisture is prevalent. USDA: 6-10 Sunset: 1-10, 14-21
