Blue Moon Wisteria vs Showy Milkweed - TreeTime.ca

Blue Moon Wisteria vs Showy Milkweed

Wisteria macrostachya Blue Moon

Asclepias speciosa

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Blue Moon Wisteria
Showy Milkweed

Blue Moon Wisteria is a striking, flowering vine, and the hardiest of the wisterias. Up to three times in one growing season you can expect showy, fragrant, lavender-blue flowers.

Make sure you plan your site as this vine requires a structure to support its mature weight. Try planting close to a post, trellis, or fence.

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.

Blue Moon Wisteria Quick Facts

Showy Milkweed Quick Facts

Zone: 3a
Zone: 3a
Height: 5 m (18 ft)
Height: 0.9 m (3 ft)
Spread: 1.5 m (5 ft)
Spread: 0.5 m (1.5 ft)
Light: full sun
Light: full sun
Moisture: normal
Moisture: dry, normal
Growth rate: fast
Growth rate: fast
Life span: medium
Life span: short
Growth form: upright, clump forming
Spreading: rhizomes - high, seeds - high
Suckering: medium
Maintenance: medium
Maintenance: medium

Toxicity: can be toxic to cats, dogs, and horses when consumed

Toxicity: toxic to pets, livestock, and humans if ingested, can cause skin and eye irritation.
Flowers: blue/purple strings of flowers
Flowers: purplish-pink clusters
Bloom time: early to mid summer
Hybrid: no
Hybrid: no
Catkins: no
Catkins: no


Native to: AB, BC, MB, YT