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Hoss Swamp Milkweed Blooms

Swamp Milkweed

$399
  • Native perennial producing fragrant pink to mauve flower clusters
  • Essential host and nectar plant for Monarch butterflies
  • Thrives in moist soils, ideal for rain gardens and bioswales
  • Attracts honey bees, butterflies, and beneficial insects
  • Grows 36–60" tall; blooms throughout summer
  • Hardy in USDA Zones 3–9; prefers full sun to partial shade
Description

Swamp Milkweed (Asclepias incarnata)—also known as Rose Milkweed—is a beautiful native perennial that thrives in moist soils across the central and eastern United States. Typically found near streams, ditches, and low-lying meadows, this species grows 4 to 5 feet tall and produces clusters of mauve-pink flowers at the tops of its stems.


Swamp Milkweed is a favorite among Monarch butterflies, providing essential habitat and nectar for caterpillars and adults alike. Its fragrant blooms also attract honey bees and other pollinators. Ideal for pollinator gardens, rain gardens, and bioswales, this hardy perennial blooms all summer long. For best germination, seeds should be cold stratified for 30 days before planting in spring or direct sown in late fall.

Growing Information

Swamp Milkweed Planting Information

Scientific Name: Asclepias incarnata

Common Name: Swamp Milkweed, Rose Milkweed

Seed Type: Perennial

Color(s): Pink

Sun Requirement: Full Sun, Partial Shade

Moisture: Moist

Height (in.): 36–60

Bloom Period: Summer

USDA Hardiness Zone(s): 3–9

Germination Temp: 70–75°F

Plant Spacing: 18"–24"

Seeding Information:

  • Seeds per Pound: 102,000
  • Ounces per 1,000 sq. ft.: 5
  • Pounds per Acre: 13
  • Planting Depth: 1/4"
  • Germination: 14–21 days with cold stratification
  • Cold Stratification: 30 days recommended before spring sowing
  • When to Plant: Early spring after stratification, or late fall for natural cold exposure
Additional Information

Notes:

  • Best grown in moist to wet soils; tolerates periodic flooding.
  • Excellent choice for naturalized areas and pollinator habitats.
  • Provides critical nectar and larval food sources for Monarch butterflies.
  • Performs well in low-lying gardens and along pond or stream edges.

  • Produces a milky sap. Foliage is poisonous to humans and animals if ingested in large quantities.