Empress Tree vs Lewis Mock Orange - TreeTime.ca

Empress Tree vs Lewis Mock Orange

Paulownia tomentosa

Philadelphus lewisii

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Empress Tree
Lewis Mock Orange

The Empress Tree is a fast growing, ornamental shade tree. It has purple, fragrant flowers that are quite attractive. The flowers emerge before the leaves in early spring. The leaves of this tree can grow very large, up to 30 cm long.

As one of the fastest growing trees in the world, this tree has been given considerable attention for carbon sequestration projects. It drops many seeds which can make it invasive in warmer climates. Please do some research and plant the right tree in the right place.

The Empress tree’s genus name comes from Princess Paulowna, daughter of Tsar Paul I of Russia.

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.

Empress Tree Quick Facts

Lewis Mock Orange Quick Facts

Zone: 5a
Zone: 4a
Height: 9 m (30 ft)
Height: 3 m (10 ft)
Spread: 9 m (30 ft)
Spread: 2.4 m (8 ft)
Light: full sun
Light: partial shade, full sun
Moisture: normal
Moisture: dry, normal
Growth rate: very fast
Growth rate: medium
Life span: medium
Life span: medium
Growth form: upright to arching, multi-stemmed
Spreading: suckering - medium, seeds - low
Suckering: medium


Flowers: light purple
Flowers: fragrant, white
Bloom time: mid spring to early summer
Hybrid: no
Hybrid: no
Catkins: no
Catkins: no


Native to: AB, BC
Other Names: chinese empress tree, foxglove tree, princess tree, royal paulownia
Other Names: california mock orange, lewis mockorange, western mock orange, western syringa, wild mock orange