Botanical profile

Sorbus sitchensis

Latin name
Sorbus sitchensis
Common name
Sitka mountain ash
Type
TREE
Family
Rosaceae

Sorbus sitchensis, commonly known as Sitka mountain-ash, is an elegant and robust ornamental tree distinguished by its finely cut foliage and clusters of decorative berries. Highly hardy, it adapts well to cool climates like those in Quebec, finding its place in medium to large gardens where it provides seasonal visual interest and biodiversity. In spring, it is covered with delicate white inflorescences, followed in summer and autumn by ovoid fruits that attract birds, adding a rich and changing color palette. Its naturally rounded and well-proportioned shape makes it a popular option as a specimen tree, at the back of a border, or as a light informal hedge, combining structure, fine texture, and ecological attractiveness with minimal maintenance.

Care guide

Growing conditions

Light, soil, water and hardiness

Hardiness zone
Zone 3–7
Exposure
Sun to partial shade
Watering
Moderate to regular
Fertilization
Balanced spring salad
Soil type
Well-drained, tolerant
Minimum temperature
-40°C
Plant appearance

Blooming, foliage and shape

Blooming period
Spring
Flower color
White (spring)
Fruiting
Decorative berries for birds
Foliage color
Green (summer) → yellow/orange (autumn)
Foliage type
Obsolete
Shape
Rounded / Globular
Garden structure

Size and growth

Height
6–9 m (20–30 ft)
Width
4–7 m (13–23 ft)
Growth rate
Moderate
Pet friendly
Safe for pets

Pets

Butterflies
Plants that attract butterflies

Butterflies

The availability of our plants varies depending on arrivals, seasons, nursery production and supplier availability. Some varieties may be offered for a limited time only, depending on their natural cycle or current stock. These plant profiles are designed to guide and inspire you when choosing plants for the garden, landscaping projects, containers or long-lasting outdoor arrangements.