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Sorbus alnifolia (Korean Mountain Ash)

Korean Mountain Ash

Sorbus alnifolia, Korean Mountain Ash, Small Tree, Shrub, Red fruit, Red berries, Winter fruits, Fall Foliage

An ideal specimen tree for small gardens, Sorbus alnifolia (Korean Mountain Ash) is a small, densely-branched, deciduous tree with a long season of interest. It grows quickly and its upright branches form a dense, rounded canopy, which casts dense shade below. The elegant foliage of glossy, ovate, dark green leaves, 2-4 in. long (5-10 cm), turns gold and orange in the fall, before falling to the ground, revealing the dark or pale gray, finely-striped bark. In late spring, a profusion of tiny white flowers held in flat-topped clusters are produced. They are quickly followed by abundant clusters of showy, orange to red fruits in fall. The berries persist well after the leaves are gone, providing a welcoming feast for various types of weary, migrating birds. Attractive in form, elegant in flower, and colorful in fruit and foliage, Sorbus alnifolia stars in almost every season of the year.

  • Grows with a pyramidal shape when young that rounds with age. Can reach 40-50 ft. in height (12-15 m) and 20-25 ft. in spread (6-8 m).
  • This tree is easily grown in full sun or light shade in acidic, moderately fertile, humus-rich, well-drained soils. Some drought tolerance.
  • Perfect specimen tree for city gardens or woodland gardens. Perfect for small gardens!
  • No routine pruning is necessary. Remove diseased, damaged, congested or crossing shoots.
  • Propagate by seed, softwood cuttings or grafting.
  • Native to China, Japan, Korea

Requirements

Hardiness 3 - 7
Heat Zones 1 - 8
Climate Zones 1A, 1B, 2A, 2B, 3A, 3B, 4, 5, 6, 7, 8, 9, 10, 14, 15, 16, 17
Plant Type Trees
Plant Family Rosaceae
Genus Sorbus
Common names Ash
Exposure Full Sun
Season of Interest Spring (Late)
Summer (Early, Mid, Late)
Fall
Height 40' - 50'
(12.2m - 15.2m)
Spread 20' - 25'
(6.1m - 7.6m)
Maintenance Low
Water Needs Low, Average
Soil Type Loam, Sand
Soil pH Acid, Neutral
Soil Drainage Well-Drained
Characteristics Showy, Fruit & Berries
Attracts Birds
Garden Uses Beds And Borders, Small Gardens
Garden Styles Informal and Cottage, City and Courtyard, Prairie and Meadow
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Alternative Plants to Consider

Sorbus intermedia (Swedish Whitebeam)
Sorbus torminalis (Wild Service Tree)
Sorbus thibetica ‘John Mitchell’ (Tibetan Whitebeam)
Sorbus americana (American Mountain Ash)
Sorbus aucuparia (European Mountain Ash)
Sorbus pseudohupehensis ‘Pink Pagoda’ (Chinese Mountain Ash)

Recommended Companion Plants

Aster amellus ‘Violet Queen’ or ‘Veilchenkönigin’ (Italian Aster)
Aconitum carmichaelii ‘Arendsii’ (Monkshood)
Miscanthus sinensis ‘Yakushima Dwarf’ (Chinese Silver Grass)
Helenium ‘Sahin’s Early Flowerer’ (Sneezeweed)

Find In One of Our Guides or Gardens

Small Trees and Shrubs That Attract Birds
Green Canopy, Better World: Exploring the Benefits of Trees
Trees that Invite Wildlife to Your Garden
Spectacular Trees for Vibrant Fall Colors: A Gardener’s Guide
Native Plant Alternatives to Sorbus aucuparia (European Mountain Ash)
While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.
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Requirements

Hardiness 3 - 7
Heat Zones 1 - 8
Climate Zones 1A, 1B, 2A, 2B, 3A, 3B, 4, 5, 6, 7, 8, 9, 10, 14, 15, 16, 17
Plant Type Trees
Plant Family Rosaceae
Genus Sorbus
Common names Ash
Exposure Full Sun
Season of Interest Spring (Late)
Summer (Early, Mid, Late)
Fall
Height 40' - 50'
(12.2m - 15.2m)
Spread 20' - 25'
(6.1m - 7.6m)
Maintenance Low
Water Needs Low, Average
Soil Type Loam, Sand
Soil pH Acid, Neutral
Soil Drainage Well-Drained
Characteristics Showy, Fruit & Berries
Attracts Birds
Garden Uses Beds And Borders, Small Gardens
Garden Styles Informal and Cottage, City and Courtyard, Prairie and Meadow
How Many Plants
Do I Need?
Explore Great Plant Combination Ideas
Sorbus (Rowan)
Guides with
Sorbus (Rowan)
Not sure which Sorbus (Rowan) to pick?
Compare Now

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