The Korean Mountain Ash Tree is a densely-branched, deciduous, ornamental, small flowering tree of the rose family. It's noted for its attractive form, creamy white flowers, simple beach-like leaves, red fall fruit and good fall color. It grows rapidly to 40-50" tall by 25" wide, with a pyramidal shape when young that rounds with age. Smooth, gray, beech-like bark is quite noticeable in Winter. Dense flat clusters (to 3' across) of 6-10 small 5-petaled white flowers appear in May.
Flowers are followed by pink to orange to scarlet berry-like fruits (to 5/8" long) that ripen in Fall and remain on the tree even after leaf-drop. Ovate to lance-shaped, glossy, toothed, dark green leaves (to 4' long) are simple (leaves of most other species of mountain ash are compound). Golden orange Fall color can be outstanding. Mountain ashes (Sorbus family) usually have ash-like leaves (except this one), but are members of the rose family, and are not related to true ashes (Fraxinus family).
The Korean Mountain Ash Tree needs to be planted in full sun with well draining soil. Little pruning is required once the tree is older, but pruning in early life improves the structure of these small flowering trees. It is recommended to prune in winter to early spring.