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Close-up of Showy Milkweed flower (Asclepias speciosa). One of 100+ species of Pacific Northwest native plants available at Sparrowhawk Native Plants, Native Plant Nursery in Portland, Oregon.
Showy Milkweed flower (Asclepias speciosa). One of 100+ species of Pacific Northwest native plants available at Sparrowhawk Native Plants, Native Plant Nursery in Portland, Oregon.
Close-up of Showy Milkweed flower (Asclepias speciosa). One of 100+ species of Pacific Northwest native plants available at Sparrowhawk Native Plants, Native Plant Nursery in Portland, Oregon.

Showy Milkweed

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$5.95
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$5.95
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per 

Asclepias speciosa

 

Host plant for monarch butterflies. Caterpillars feed exclusively on milkweed plants. Flowers also attract an array of bees, flies, and butterflies. This plant can be slow to get going, but once established it can spread rapidly. Seeds were collected in Benton County Oregon.

  • Height: 36" - 48"
  • Width: Spreads laterally by rhizomes
  • Canopy layer: herbaceous
  • Light requirements: full sun to part shade
  • Moisture requirements: dry to moist soil
  • Bloom Time: late June, early to mid July

 

Sowing instructions: Direct sowing is not recommended. Showy milkweed seedlings are small and not vigorous in their first year. They are easily overtaken by other plants.

Growing transplants: Seeds are not dormant but germinate best in warm temperatures (65-80 degrees). Seedlings will grow slowly the first summer in the containers, should be transplanted out into the landscape in fall when dormant, and will emerge again the following April. 

Source: Steele Acres Native Willamette Valley Seed. Each packet contains approximately 50 seeds

 

Photo Credit 1: "Showy Milkweed (Asclepias speciosa) Seedskadee NWR" by USFWS Mountain Prairie is licensed under CC BY 2.0

Photo Credit 2: "Asclepias speciosa--RPBG--9 June 2007" by John Rusk is licensed under CC BY 2.0

Photo Credit 3: "Asclepias speciosa" by Matt Lavin is licensed under CC BY-SA 2.0