Showy Milkweed vs Lewis Mock Orange - TreeTime.ca

Showy Milkweed vs Lewis Mock Orange

Asclepias speciosa

Philadelphus lewisii

NOT AVAILABLE THIS SEASON - MIGHT RETURN

COMING SOON

(new stock expected: fall of 2026)

Showy Milkweed
Lewis Mock Orange

Showy Milkweed is a native perennial wildflower known for its fragrant clusters of pink to purple, star-shaped flowers. It is an essential plant for Monarch butterflies, acting as a critical host plant for caterpillars and a nectar source for adults. Blooming from early to mid-summer, these flowers also supply nectar to many other pollinators, including bees, butterflies, moths, and hummingbirds.

Ideal for butterfly conservation, pollinator gardens, and naturalization projects, Showy Milkweed thrives in a wide range of soils, including dry and rocky ground. While it spreads via underground rhizomes to form colonies, it is much less aggressive than Common Milkweed (Asclepias syriaca).

Note: All parts of the plant contain toxic cardiac glycosides, especially the milky sap. Do not ingest any part of the plant and prevent sap from contacting skin or eyes. Toxic to humans, pets, and livestock.

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.

Showy Milkweed Quick Facts

Lewis Mock Orange Quick Facts

Zone: 3a
Zone: 4a
Height: 0.9 m (3 ft)
Height: 3 m (10 ft)
Spread: 0.5 m (1.5 ft)
Spread: 2.4 m (8 ft)
Light: full sun
Light: partial shade, full sun
Moisture: dry, normal
Moisture: dry, normal
Growth rate: fast
Growth rate: medium
Life span: short
Life span: medium
Growth form: upright, clump forming
Growth form: upright to arching, multi-stemmed
Spreading: rhizomes - high, seeds - high
Spreading: suckering - medium, seeds - low
Maintenance: medium

Toxicity: toxic to pets, livestock, and humans if ingested, can cause skin and eye irritation.

Flowers: purplish-pink clusters
Flowers: fragrant, white
Bloom time: early to mid summer
Bloom time: mid spring to early summer
Hybrid: no
Hybrid: no
Catkins: no
Catkins: no


Native to: AB, BC, MB, YT
Native to: AB, BC
Other Names: california mock orange, lewis mockorange, western mock orange, western syringa, wild mock orange