American Mountain Ash vs Lewis Mock Orange - TreeTime.ca

American Mountain Ash vs Lewis Mock Orange

Philadelphus lewisii

Sorbus americana

COMING SOON

(new stock expected: fall of 2026)

COMING SOON

(new stock expected: fall of 2026)

Lewis Mock Orange
American Mountain Ash

Lewis Mock Orange is a flowering ornamental shrub that produces an abundance of white, fragrant blooms. The flowers have a sweet scent similar to orange blossoms, with a hint of pineapple. They bloom for several weeks from late spring to early summer, attracting pollinators and other beneficial insects.

Native to North America, Lewis Mock Orange is found from the southernmost portions of Alberta and British Columbia, and south into the northwestern United States. It makes an attractive shrub and can be used in hedgerows, pollinator gardens, and naturalization projects. Blooms occur on the previous year’s wood, so it is recommended to prune after it has finished flowering.

American Mountain ash is a beautiful, medium-sized ornamental tree that is ideal for residential lots. Mountain Ash blooms with tiny white flowers in the spring, followed by clusters of small red/orange berries in the summer.

American Mountain Ash's berries stay on the tree throughout the winter. This attracts birds and other small wildlife to your landscape as the berries are an important food source during the winter months.

Lewis Mock Orange Quick Facts

American Mountain Ash Quick Facts

Zone: 4a
Zone: 2a
Height: 3 m (10 ft)
Height: 10 m (32 ft)
Spread: 2.4 m (8 ft)
Spread: 6 m (20 ft)
Light: partial shade, full sun
Light: full sun
Moisture: dry, normal
Moisture: dry, normal
Growth rate: medium
Growth rate: medium
Life span: medium
Life span: medium
Growth form: upright to arching, multi-stemmed
Spreading: suckering - medium, seeds - low
Suckering: none


Fall colour: scarlet red
Flowers: fragrant, white
Flowers: white clusters, spring
Bloom time: mid spring to early summer
Berries: bunches of orange-red
Seeds: seeds contained within the berries
Hybrid: no
Hybrid: no
Catkins: no
Catkins: no


Native to: AB, BC
Native to: ON, QC, NS, NB, NL, PE
Other Names: california mock orange, lewis mockorange, western mock orange, western syringa, wild mock orange
Other Names: dogberry