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Asclepias speciosa (Showy Milkweed)

Showy Milkweed, American Silkweed, Jewelweed, Silken Cissy, Silkweed, Swallow Wort, White Indian Hemp

Showy Milkweed, American Silkweed, Jewelweed, Silken Cissy, Silkweed, Swallow Wort, White Indian Hemp
Showy Milkweed, American Silkweed, Jewelweed, Silken Cissy, Silkweed, Swallow Wort, White Indian Hemp

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. Flowers are a great source of nectar for butterflies, hummingbirds, bees, and other beneficial insects. The flowers occur on stalks from the leaf axils and at the top of upright stems clad with velvety, large, oval, blue-green leaves. They give way to prominent seed pods in the fall, which look great in dried flower arrangements. When the seed pods open, they reveal seeds with long, silvery-white, silky hairs. A great choice for the flower garden and for natural settings. 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 2-4 ft. tall (60-120 cm) and 12-18 in. wide (30-45 cm). May self-seed if seed pods are not removed prior to splitting open.
  • Thrives in full sun in dry to medium well-drained soils. Does well in poor, dry, gravelly soils
  • Low maintenance, this perennial plant is generally pest and disease free. Deer resistant.
  • Perfect for sunny borders, cottage gardens, butterfly gardens, and prairies or naturalized areas.
  • Plants have deep taproots and are best left undisturbed once established.
  • Propagate by root cuttings in fall or early spring. Seeds may be sown outside in late fall or the following spring.
  • Toxic to dogs, toxic to cats, toxic to horses.
  • Native to western North America

Grow Milkweed, Save Monarch Butterflies: A Step-by-Step Guide


By providing the right growing conditions, you can enjoy healthy and vibrant milkweed in your garden while supporting pollinator populations.

Requirements

Hardiness 3 - 9
Climate Zones 1, 1A, 1B, 2, 2A, 2B, 3, 3A, 3B, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Plant Type Perennials
Plant Family Apocynaceae
Genus Asclepias
Common names Showy Milkweed, Milkweed, Jewelweed
Exposure Full Sun
Season of Interest Spring (Late), Summer (Early)
Height 2' - 4' (60cm - 120cm)
Spread 1' - 2' (30cm - 60cm)
Spacing 18" (50cm)
Maintenance Low
Water Needs Average
Soil Type Chalk, Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Well-Drained
Characteristics Fragrant, Showy
Native Plants United States, Pacific Northwest, Southwest, Rocky Mountains, California, Midwest, Kansas, Michigan, Minnesota, North Dakota, Iowa, Nebraska, Wisconsin, Illinois, South Dakota, Idaho, Washington, Oregon, Texas, Oklahoma, Arizona, Nevada, New Mexico, Colorado, Wyoming, Utah, Montana
Tolerance Drought, Deer
Attracts Bees, Butterflies, Hummingbirds
Garden Uses Beds And Borders
Garden Styles Prairie and Meadow, 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

Crocosmia (Montbretia)
Anthemis tinctoria (Golden Marguerite)
Kniphofia (Red Hot Poker)
Agapanthus (African Lily)

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Asclepias (Milkweed)
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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 - 9
Climate Zones 1, 1A, 1B, 2, 2A, 2B, 3, 3A, 3B, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24
Plant Type Perennials
Plant Family Apocynaceae
Genus Asclepias
Common names Showy Milkweed, Milkweed, Jewelweed
Exposure Full Sun
Season of Interest Spring (Late), Summer (Early)
Height 2' - 4' (60cm - 120cm)
Spread 1' - 2' (30cm - 60cm)
Spacing 18" (50cm)
Maintenance Low
Water Needs Average
Soil Type Chalk, Clay, Loam, Sand
Soil pH Acid, Alkaline, Neutral
Soil Drainage Well-Drained
Characteristics Fragrant, Showy
Native Plants United States, Pacific Northwest, Southwest, Rocky Mountains, California, Midwest, Kansas, Michigan, Minnesota, North Dakota, Iowa, Nebraska, Wisconsin, Illinois, South Dakota, Idaho, Washington, Oregon, Texas, Oklahoma, Arizona, Nevada, New Mexico, Colorado, Wyoming, Utah, Montana
Tolerance Drought, Deer
Attracts Bees, Butterflies, Hummingbirds
Garden Uses Beds And Borders
Garden Styles Prairie and Meadow, Informal and Cottage
How Many Plants
Do I Need?
Explore Great Plant Combination Ideas
Asclepias (Milkweed)
Not sure which Asclepias (Milkweed) to pick?
Compare Now

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