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Asclepias incarnata (Swamp Milkweed)

Swamp Milkweed, Pink Milkweed

Asclepias incarnata, Swamp Milkweed, Pink Milkweed, Pink flowers
Asclepias incarnata, Swamp Milkweed, Pink Milkweed, Pink flowers

Asclepias incarnata (Swamp Milkweed) is an erect, clump-forming perennial prized for its brilliant clusters of fragrant, lilac-pink flowers, which bloom continuously for weeks from mid to late summer. Sitting atop upright branching stems, clad with stiff, lance-shaped, taper-pointed leaves, the colorful umbels give way to attractive seed pods in the fall, which persist into winter. Flowers are a great nectar source for bees, beneficial insects, and butterflies. Milkweeds are host plants for the monarch butterfly. Milkweed plants are critical to 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 in sturdy, upright clumps up to 4-5 ft. tall (120-150 cm) and 2-3 ft. wide (60-90 cm)
  • Thrives in full sun in medium to wet soils but is tolerant of average well-drained soils.
  • Low maintenance, this perennial plant is generally pest and disease free.
  • Perfect for sunny borders, cottage gardens, butterfly gardens, wet meadows, rain gardens, bog gardens, and near ponds and streams. Excellent as cut flowers with a long vase life.
  • Plants have deep taproots and are best left undisturbed once established.
  • Stems exude a toxic milky sap when cut.
  • Toxic to dogs, toxic to cats, toxic to horses.
  • Native to North America

Requirements

Hardiness 3 - 11
Plant Type Perennials
Plant Family Apocynaceae
Genus Asclepias
Common names Milkweed, Swamp Milkweed
Exposure Full Sun
Season of Interest Summer (Mid, Late)
Height 4' - 5'
(120cm - 150cm)
Spread 2' - 3'
(60cm - 90cm)
Spacing 36" (90cm)
Maintenance Low
Water Needs Average, High
Soil Type Clay, Loam
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained, Moisture Retentive, Poorly Drained
Characteristics Fragrant, Showy
Native Plants United States, Northeast, Pennsylvania, Rhode Island, Vermont, Connecticut, Delaware, Maine, Massachusetts, Maryland, New Hampshire, New Jersey, New York, Midwest, Ohio, South Dakota, Missouri, Minnesota, Nebraska, North Dakota, Iowa, Indiana, Illinois, Kansas, Wisconsin, Michigan, Pacific Northwest, Idaho, Southeast, Louisiana, North Carolina, South Carolina, Tennessee, Virginia, West Virginia, Alabama, Arkansas, Florida, Georgia, Kentucky, Southwest, Texas, Nevada, New Mexico, Oklahoma, Utah, Wyoming, Colorado, Montana, Rocky Mountains
Tolerance Deer, Clay Soil, Wet Soil
Attracts Bees, Butterflies, Hummingbirds
Garden Uses Beds And Borders, Bog Gardens, Ponds And Streams, Rain Gardens
Garden Styles Informal and Cottage
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Alternative Plants to Consider

Asclepias eriocarpa (Woollypod Milkweed)
Asclepias subulata (Rush Milkweed)
Asclepias perennis (Aquatic Milkweed)
Asclepias cordifolia (Heartleaf Milkweed)
Asclepias linaria (Pine-Needle Milkweed)
Asclepias quadrifolia (Fourleaf Milkweed)

Recommended Companion Plants

Eupatorium maculatum (Spotted Joe-Pye Weed)
Echinacea purpurea ‘White Swan’ (Coneflower)
Perovskia ‘Little Spire’ (Russian Sage)
Helenium (Sneezeweed)

Find In One of Our Guides or Gardens

How to Create an Enchanting Butterfly Garden
For the Love of Butterflies: Best Flowers to Attract them to Your Garden
6 Reasons You Should Create a Butterfly Garden
Grow Milkweed, Save Monarch Butterflies: A Step-by-Step Guide
Asclepias (Milkweed)
Save Monarch Butterflies with these Ornamental Milweeds
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.
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Requirements

Hardiness 3 - 11
Plant Type Perennials
Plant Family Apocynaceae
Genus Asclepias
Common names Milkweed, Swamp Milkweed
Exposure Full Sun
Season of Interest Summer (Mid, Late)
Height 4' - 5'
(120cm - 150cm)
Spread 2' - 3'
(60cm - 90cm)
Spacing 36" (90cm)
Maintenance Low
Water Needs Average, High
Soil Type Clay, Loam
Soil pH Acid, Alkaline, Neutral
Soil Drainage Moist but Well-Drained, Moisture Retentive, Poorly Drained
Characteristics Fragrant, Showy
Native Plants United States, Northeast, Pennsylvania, Rhode Island, Vermont, Connecticut, Delaware, Maine, Massachusetts, Maryland, New Hampshire, New Jersey, New York, Midwest, Ohio, South Dakota, Missouri, Minnesota, Nebraska, North Dakota, Iowa, Indiana, Illinois, Kansas, Wisconsin, Michigan, Pacific Northwest, Idaho, Southeast, Louisiana, North Carolina, South Carolina, Tennessee, Virginia, West Virginia, Alabama, Arkansas, Florida, Georgia, Kentucky, Southwest, Texas, Nevada, New Mexico, Oklahoma, Utah, Wyoming, Colorado, Montana, Rocky Mountains
Tolerance Deer, Clay Soil, Wet Soil
Attracts Bees, Butterflies, Hummingbirds
Garden Uses Beds And Borders, Bog Gardens, Ponds And Streams, Rain Gardens
Garden Styles Informal and Cottage
How Many Plants
Do I Need?
Explore Great Plant Combination Ideas
Asclepias (Milkweed)
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