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Sitka Mountain-ash

Sorbus sitchensis

Family: Rosaceae (ro-ZAY-see-ee) (Info)
Genus: Sorbus (sor-bus) (Info)
Species: sitchensis (sit-KEN-sis) (Info)



Foliage Color:

Unknown - Tell us

Bloom Characteristics:

Unknown - Tell us

Water Requirements:

Unknown - Tell us

Where to Grow:

Unknown - Tell us


4-6 ft. (1.2-1.8 m)

6-8 ft. (1.8-2.4 m)

8-10 ft. (2.4-3 m)

10-12 ft. (3-3.6 m)


Unknown - Tell us


Unknown - Tell us

Sun Exposure:

Unknown - Tell us


Unknown - Tell us

Bloom Color:

White/Near White

Bloom Time:

Mid Summer



Other details:

Unknown - Tell us

Soil pH requirements:

Unknown - Tell us

Patent Information:

Unknown - Tell us

Propagation Methods:

Unknown - Tell us

Seed Collecting:

Unknown - Tell us


This plant has been said to grow in the following regions:

Anchorage, Alaska

Seward, Alaska

Eugene, Oregon

Gardeners' Notes:


On Sep 22, 2012, MulchingMan from Eugene, OR wrote:

I had a young (~4-year-old) specimen up until recently. It began growing strongly at my previous residence, survived a mid-August transplant to our new house last summer, and grew an additional 10 inches this past April. Unfortunately, like other members of the rose family, Sitka mountain-ashes are susceptible to the various bacterial and fungal blights. We had a very wet spring and I didn't keep a close enough eye on this shrub. By early August, I had to remove about 70% of the stems because they had turned black. I also had to cut two large buds which were covered with black spots. After a few weeks of hemming and hawing, I finally trashed it and planted a toyon in its place (which, in retrospect, is probably a better fit for this location).

I was going to give this ... read more


On Oct 29, 2006, Grasmussen from Anchorage, AK (Zone 4a) wrote:

Sorbus sitchensis, Common Names include: Mountain Ash, Sitka Mountain Ash, Western Mountain Ash, Pacific Mountain Ash. It is a deciduous shrub or small tree, usually multi-stemmed. It is often confused with Sorbus aucuparia the European Mountain Ash, because landscape nurseries, have been supplying the faster growing European Mt. Ash for several decades. Within metropolitan areas, throughout Sorbus sitchensis range, the European import is the predominant species. While the Sorbus sitchensis is the predominant species in the mountains and back country. However, the mix of species is changing in many areas. The berries, of both species, which remain an the plant into the winter are a staple winter food of Bohemian Waxwings. In Anchorage, Alaska flocks of hundreds and sometimes even thou... read more