Asclepias speciosa, commonly called showy milkweed, occurs on dry slopes, open woodland areas, roadsides, waste areas and along streams in western North America.
This species grows in a wide range of soil types, including clay.
It is best used as part of a wild flower planting as it spreads quite vigorously by underground rhizomes.
That said, the tiny pink flowers are a nectar rich haven for butterflies, moths and other pollinators. Like all of the genus, they are late to emerge and require a deal of warmth before emerging in late spring.
Photo: © Jelitto