Alphabetical Plant Listing

Asclepias perennis (Aquatic Milkweed)

Aquatic Milkweed, White Milkweed, Swamp Milkweed


Asclepias perennis (Aquatic Milkweed) is an erect perennial boasting flat umbels packed with up to 20-50 white starry flowers, often pinkish along the undersides towards their tips. Blooming from late spring to fall for about 4-8 weeks, the mildly fragrant flowers are a great source of nectar for butterflies, bees, and other beneficial insects. The blooms occur on upright purplish-green stems clad with opposite, short and narrow, green leaves, 3-5 in. long (7-12 cm). They give way to smooth pendulous seed pods that split along a single suture to release the seeds. Unlike most of Asclepias species which have fluffy seeds that are dispersed by the wind, Aquatic Milkweed has winged seeds that are designed to float on the surface of the water and are dispersed with flood events. Found in areas with soils that are continuously wet such as floodplains, water way margins, marshes, cypress swamps, ditches, and wet lands, Aquatic Milkweed is a great choice for the bog garden.

Milkweed plants are critical to the monarch butterflies survival, whose population in North America has plummeted by 90% in the last 20 years. By planting milkweed in your own garden, you can help reverse the fortune of these beautiful insects!

  • Grows up to 2-3 ft. tall (60-90 cm) and 12 in. wide (30 cm).
  • Thrives in full sun to part shade in wet to consistently moist soils. Standing water is tolerated if it is temporary.
  • Low maintenance, this perennial plant is generally pest and disease free. Deer and rabbit resistant.
  • Perfect for bog gardens, butterfly gardens, along ponds and streams.
  • Propagate by seed.
  • Native to the United States, it occurs along the Mississippi River in Illinois and south to the Gulf, extending over to Florida.

Learn How To Plant, Care and Grow Splendid Asclepias

Mostly native to the U.S. and Canada, Asclepias include over 100 species of evergreen or deciduous perennials adorned with clusters of small, interestingly shaped blooms that are irresistible to butterflies. Attractive and easy to grow, they shine in many gardens. However, some basic rules need to be followed to enjoy their splendid flowers.Read More

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Requirements

Hardiness 6 – 11
Plant Type Perennials
Plant Family Asclepias
Exposure Full Sun, Partial Sun
Season of Interest Spring (Late)
Summer (Early,Mid,Late)
Fall
Height 2' – 3' (60cm – 90cm)
Spread 10" – 1' (25cm – 30cm)
Spacing 12" (30cm)
Water Needs High
Maintenance Low
Soil Type Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moisture Retentive, Poorly Drained
Characteristics Fragrant, Showy
Native Plants United States, Midwest, Illinois, Indiana, Missouri, Southeast, Alabama, Arkansas, Florida, Georgia, Kentucky, Louisiana, Mississippi, South Carolina, Tennessee, Southwest, Texas
Tolerance Deer, Rabbit, Wet Soil
Attracts Butterflies
Garden Uses Ponds and Streams
Garden Styles Informal and Cottage

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Great Plant Combination Ideas with Asclepias

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Patrick Alexander, gailhampshire, Flickr

While every effort has been made to describe these plants accurately, please keep in mind that height, bloom time, and color may differ in various climates. The description of these plants has been written based on numerous outside resources.


Requirements

Hardiness 6 – 11
Plant Type Perennials
Plant Family Asclepias
Exposure Full Sun, Partial Sun
Season of Interest Spring (Late)
Summer (Early,Mid,Late)
Fall
Height 2' – 3' (60cm – 90cm)
Spread 10" – 1' (25cm – 30cm)
Spacing 12" (30cm)
Water Needs High
Maintenance Low
Soil Type Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moisture Retentive, Poorly Drained
Characteristics Fragrant, Showy
Native Plants United States, Midwest, Illinois, Indiana, Missouri, Southeast, Alabama, Arkansas, Florida, Georgia, Kentucky, Louisiana, Mississippi, South Carolina, Tennessee, Southwest, Texas
Tolerance Deer, Rabbit, Wet Soil
Attracts Butterflies
Garden Uses Ponds and Streams
Garden Styles Informal and Cottage

Great Plant Combination Ideas with Asclepias

Guides with Asclepias

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