Content Detail

Korean mountain-ash is a medium sized tree with interesting ornamental features. The tree flowers white in spring and the white flowers are followed by red fruit. Yellow fall color and gray bark complete the picture. This tree does best in a lawn situation. Streets and city sites should be avoided.

  • Family (English) Rose
  • Family (botanic) Rosaceae
  • Tree or plant type Tree
  • Foliage Deciduous (seasonally loses leaves)
  • Native locale Non-native
  • Size range Large tree (more than 40 feet)
  • Light exposure Full sun (6 hrs direct light daily)
  • Hardiness zones Zone 4, Zone 5 (Chicago), Zone 6, Zone 7
  • Soil preference Moist, well-drained soil
  • Tolerances Alkaline soil
  • Season of interest early fall, late spring, late summer, mid fall, mid spring, midsummer
  • Flower color and fragrance White
  • Shape or form Oval, Pyramidal
  • Growth rate Fast, Moderate

Native geographic location and habitat:

Korea, Japan and China

Bark color and texture:

Bark is smooth and gray.

Leaf or needle arrangement, size, shape, and texture:

The leaf is simple which is unusual as most mountain-ash species have compound leaves. They alternate on the twig and are  oval with unequal teeth around the edges. Fall color is a mix of yellow, orange and brown.

Flower arrangement, shape, and size:

Blooms are small, white flowers in a flat-topped cluster which is  2 to 3 inches in diameter.

Fruit, cone, nut, and seed descriptions:

Fruits are red, berry-like pommes in clusters, appearing  late summer into fall.

Plant care:

Korean mountain-ash is generally a short-lived tree. Avoid polluted and dry sites.

List of pests, diseases, and tolerances:

Fire blight, canker, rust, scale insects and borers can attack this tree. It may be difficult to find in nurseries.

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