Yellow Hedysarum vs Showy Milkweed - TreeTime.ca

Yellow Hedysarum vs Showy Milkweed

Hedysarum sulphurescens

Asclepias speciosa

CUSTOM GROW

NOT AVAILABLE THIS SEASON - MIGHT RETURN

Yellow Hedysarum
Showy Milkweed

Yellow Hedysarum is a native perennial wildflower recognized for its clusters of pale yellow to creamy-white, pea-like blooms. Flowering from late spring into summer, it adds subtle colour to grasslands, roadsides, and open woods while attracting a variety of pollinators, especially bumblebees.

As a nitrogen-fixing plant, Yellow Hedysarum enriches soils and supports the growth of surrounding vegetation. Its deep taproot and extensive root system make it drought-tolerant and effective at stabilizing soil. Grizzly bears are known to dig up and eat the nutritious taproot. Its resilience and ecological value make it well-suited for restoration, naturalization, pollinator gardens, and erosion control projects.

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.

Yellow Hedysarum Quick Facts

Showy Milkweed Quick Facts

Zone: 2b
Zone: 3a
Height: 0.5 m (1.5 ft)
Height: 0.9 m (3 ft)
Spread: 0.2 m (0.8 ft)
Spread: 0.5 m (1.5 ft)
Light: partial shade, full sun
Light: full sun
Moisture: dry, normal
Moisture: dry, normal
Growth rate: fast
Growth rate: fast
Life span: short
Life span: short
Growth form: ascending to upright
Growth form: upright, clump forming
Spreading: seeds - low
Spreading: rhizomes - high, seeds - high
Maintenance: medium


Toxicity: toxic to pets, livestock, and humans if ingested, can cause skin and eye irritation.
Flowers: creamy yellow, in dense spikes
Flowers: purplish-pink clusters
Bloom time: late spring to summer
Bloom time: early to mid summer
Hybrid: no
Hybrid: no
Catkins: no
Catkins: no


Native to: AB, BC
Native to: AB, BC, MB, YT
Other Names: sulphur hedysarum, sulphur sweet-vetch, yellow sweet-vetch