Found in weedy locations along roadsides, cultivated fields and irrigation ditches, as well as riparian and wetland sites up to about 7,000 feet. A popular native wildflower in western North America, Showy Milkweed (Asclepias speciosa) commonly occurs on rocky slopes, woodland areas, or along roads or streams. We are happy to offer one of the showiest milkweeds, with a wide range in California, always a pleasure to see. Its blossoms are of a soft, rich pink and deliciously fragrant. Milkweed is the host plant of the monarchs. Its 5" long Its fuzzy leaves are often covered with the caterpillars of Monarch butterflies in summer. (Photo by Kathy Keatley Garvey) Close quarters: a honey bee and a monarch caterpillar on tropical milkweed. Image of american, weeds, wildflowers - 45110854 A more manageable garden plant than common milkw There are 5 separate sepals (petal-like leaves) and 5 fused petals. Liam O'Brien. (Photo by Kathy Keatley Garvey) The female monarch spreads its wings. Herbage tomentose. Rhizomatous. Habitat. The flowers of this milkweed are fragrant." Its blossoms are of a soft, rich pink and deliciously fragrant. Similar Photos See All. (Photo by Kathy Keatley Garvey) A female monarch stops at the tropical milkweed, Asclepias curassavica. Growth pattern. Showy milkweed seeds need 30 days of cold stratification to improve germination, Sow the seeds about 1/4 inch deep. Choose from tropical milkweed varieties or our California native species. It is found in the western half of the US and up into Canada. Showy Milkweed seeds and plants for sale. This milkweed is native to California. Showy milkweed is native to much of the western half of North America. I remember talking to Carol Bornstein ( a legitimate California native plant expert) she asked me do yours ever flower? Monarch butterflies are rapidly declining due to loss of habitat and use of pesticides. Asclepias speciosa (showy milkweed) occurs in all the western states and is the top choice for restoration in this region with A. latifolia (broadleaf milkweed) a second choice. She ended up laying eggs on the tropical milkweed and showy milkweed. The flowers are a great source of nectar for butterflies, hummingbirds, bees, and other beneficial insects. Photo about Showy Milkweed blooming in California s Yosemite National Park. Planting milkweed is the most effective way to help because it is the only plant that sustains a monarch through each of its life stages. We shouldn’t plant it in Southern California. 3-4 ft. tall x 24-30" wide. Spreading via underground runners, pink milkweed can be a little too aggressive for formal perennial beds. Ecological Function Th Cold hardy in USDA zones 3-11. Asclepias speciosa (Showy Milkweed) is an erect, clump-forming perennial prized for its brilliant spherical clusters of fragrant, pinkish-white, starry flowers, which bloom from late spring to early summer. Easy to grow in a wide range of soils, this variety is recommended for use in the West. Habitat and range. In California it is found in the Sierras and Coast Ranges, from Tulare County to Modoc and Siskiyou Counties. Western monarchs overwintering in Arroyo Grande, California. Asclepias speciosa is a milky-sapped perennial plant in the dogbane family (Apocynaceae), known commonly as the showy milkweed, and is found in the Western half of North America. Media Marketing/Shutterstock A monarch butterfly lands on a swamp milkweed plant. However its natural range is in Central and Northern California. As with Common milkweed, Showy milkweed can become very invasive in the garden. California Narrow Leaf Milkweed (Asclepias fascicularis) is a western native species of Asclepias grown for its large white flowers and long, showy narrow leaves. (Photo by Kathy Keatley Garvey) A honey bee makes a beeline for the tropical milkweed,Asclepias curassavica. I only recommend planting milkweed that is native to your area. Asclepias speciosa has a similar appearance to Common Milkweed, but its pinkish-purple flowers have longer, tapered petals that are covered with fine hairs.These persistant, fragrant blooms are often described as looking like small crowns. Image of weeds, blooming, still - 71463249 (Photo by Kathy Keatley Garvey) Two honey bees go about their "bees-ness" while a monarch caterpillar dines. Liam O'Brien is a San Francisco-based lepidopterist. Monarch butterflies feed exclusively on milkweed plants and depend on them for their survival. Save Comp. Germination can occur as quickly as one week but may take longer. Milkweed is the host plant of the monarchs. 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