Greene’s Mountain Ash

(Sorbus scopulina)

Greene’s Mountain Ash (Sorbus scopulina)

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Estimated Native Range
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Summary

Sorbus scopulina, commonly known as Greene’s Mountain Ash or Cascade Mountain-Ash, is a deciduous shrub or small tree native to montane regions, subalpine zones, and forest clearings of Western and Intermountain North America. It is particularly prevalent in the Cascade Mountains and the Pacific Northwest. This species typically grows to a height of 10-30 feet (3-9 meters) with a similar spread, and is characterized by its pinnate leaves and clusters of cream to white flowers that bloom in late spring to early summer. The flowers are followed by clusters of orange-red berries that persist into winter, providing visual interest and food for wildlife.

Greene’s Mountain Ash is valued for its ornamental clusters of berries and its ability to attract birds and other wildlife. It is used in naturalized plantings, as a specimen in residential gardens, and for restoration projects. The plant is relatively easy to maintain, tolerating a range of soil conditions, though it prefers well-drained soils. It is also appreciated for its resistance to many common diseases. However, it can be susceptible to fire blight and may suffer from rust diseases in certain conditions. Gardeners should avoid over-watering and ensure good air circulation to minimize these risks. Despite its bitter taste when fresh, the berries can be cooked and made into jelly, a practice that dates back to Native Americans and early settlers. Care should be taken not to confuse the edible berries of Sorbus scopulina with the toxic red baneberry.CC BY-SA 4.0

Plant Description

  • Plant Type: Shrub, Tree
  • Height: 8-15 feet
  • Width: 5-10 feet
  • Growth Rate: Moderate
  • Flower Color: Cream, White
  • Flowering Season: Summer
  • Leaf Retention: Deciduous

Growth Requirements

  • Sun: Full Sun, Part Shade
  • Water: Medium
  • Drainage: Fast, Medium

Common Uses

Bee Garden, Bird Garden, Butterfly Garden, Edible*Disclaimer: Easyscape's listed plant edibility is for informational use. Always verify the safety and proper identification of any plant before consumption., Fire Resistant, Fragrant, Low Maintenance, Salt Tolerant, Showy Flowers

Natural Habitat

Montane regions, subalpine zones, and forest clearings in Western and Intermountain North America

Other Names

Common Names: Cascade Mountain Ash , Greene’s Mountain-Ash , Rocky Mountain Mountain-Ash , Western Mountain Ash , Sorbier De Greene , Sorbier De Greene Typique , Bergrönn

Scientific Names: Sorbus scopulina , Sorbus scopulina var. scopulina , Pyrus scopulina , Sorbus alaskana , Sorbus angustifolia , Pyrus andersonii , Sorbus andersonii

GBIF Accepted Name: Sorbus scopulina Greene