Mountainash, American Sorbus americana
This small native tree's dark green leaves turn yellow, orange and reddish-purple in the fall. Showy white spring flowers are followed by large clusters of flame-red, berry-like fruit loved by birds. Likes acidic soil with good drainage, full sun to light shade. Grows to 10'–30'.Pricing Information
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Hardiness Zones 2 - 5The American Mountainash can be expected to grow in the zones shown in color in the arborday.org zone map. View Map
Type of treeFlowering Trees, Ornamental Trees
Mature HeightThe American Mountainash grows to be 10' - 30' feet in height.
Mature SpreadThe American Mountainash has a spread of about 15' at full maturity.
SunThis mountainash does well in full sun, partial shade.
SoilThe American Mountainash grows in acidic, loamy, sandy, well drained, wet, clay soils.
ShapeThis mountainash has oval shape.
Spectacular fall foliage. The fruit provides winter food for birds.
This small native tree's dark green leaves turn yellow, orange and reddish-purple in the fall. Showy white spring flowers are followed by large clusters of flame-red, berry-like fruit loved by birds. Likes acidic soil with good drainage, full sun to light shade. Grows to 10'–30'.
The American Mountainash is an important source of food for many small birds and mammals including catbirds, thrushes and waxwings. Fruits persist through winter.
First cultivated in 1811. The Mountain Ash is a northern tree that is a true plastic taxon inasmuch as it will interbreed with other families of trees and plants including the great rose family. The fruit has been known to intoxicate birds. Also known as the Rowantree because it resembles the European Rowantree. The bark was used as a anti-malarial medicine by pioneer doctors because of its close resemblance to the Quininetree. It was also believed to be powerful in exorcising witches by the early settlers and was known as Witchwood.
Alternate, compound 6–10" long, 11-17 lance-shaped, dark green, 2–2 1/2" leaflets. Fall colors are yellow, orange and reddish-purple.
Orange-red, 1/4", berry-like fruit in large clusters that persist in winter.
Rate of growth refers to the vertical increase in growth unless specified differently. Rate, as is true for size, is influenced by numerous variables such as soil, drainage, water, fertility, light, exposure, ad infinitum. The designation slow means the plant grows 12” or less per year; medium refers to 13 to 24” of growth per year; and fast to 25” or greater.Manual of Woody Landscape Plants, by Michael Dirr.