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Asclepias incarnata – Swamp Milkweed

Additional information

Size

, , , ,

Common Name

Type

Family

Native?

Zone

3, 4, 5, 6

Height Range (ft.)

4.00 to 5.00

Spread (ft.)

2.00 to 3.00

Bloom Time

,

Bloom Description

Mauve, Pink, White

Sun

Water

,

Flower

,

Maintenance

Suggested Use

,

Tolerate

, ,

Attracts

, , ,

Growth Rate

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Asclepias incarnata – Swamp Milkweed

Asclepias incarnata, or Swamp Milkweed, is a native perennial with fragrant pink blooms that attract monarchs—ideal for rain gardens and sunny wet soils.

$12.99$149.99

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Additional information

Size

, , , ,

Common Name

Type

Family

Native?

Zone

3, 4, 5, 6

Height Range (ft.)

4.00 to 5.00

Spread (ft.)

2.00 to 3.00

Bloom Time

,

Bloom Description

Mauve, Pink, White

Sun

Water

,

Flower

,

Maintenance

Suggested Use

,

Tolerate

, ,

Attracts

, , ,

Growth Rate

Product Description

Discover the ecological importance and striking beauty of Asclepias incarnata, commonly known as Swamp Milkweed. This native perennial is a favorite among pollinator plants, known for its fragrant, showy clusters of pink to rose-colored flowers that bloom from mid to late summer. Perfect for gardeners looking to attract butterflies—especially monarchs—Swamp Milkweed also supports bees and other pollinators, making it an essential addition to eco-friendly landscapes.

Why Choose Swamp Milkweed?

  • Pollinator Magnet: The fragrant flowers attract a wide variety of pollinators, including bees, butterflies, and hummingbirds. It’s especially important for monarch butterflies, serving as a host plant for their caterpillars.
  • Wetland Tolerant: Swamp Milkweed thrives in moist, wet conditions, making it ideal for rain gardens, wet meadows, and planting near ponds or streams.
  • Fragrant Blooms: Clusters of fragrant pink or rose-colored flowers provide mid-summer color and a lovely scent, enhancing the sensory experience of any garden.
  • Wildlife Support: In addition to supporting pollinators, this plant provides habitat for a variety of beneficial insects and other wildlife.

Cultivation Tips

  • Sunlight Needs: Prefers full sun but can tolerate partial shade in hotter climates.
  • Soil Requirements: Thrives in moist to wet soils, making it perfect for rain gardens, low areas, or alongside water features. It adapts to average garden soil if watered regularly.
  • Watering: Keep soil consistently moist, especially in drier climates or during hot weather. It is well-suited for wet or boggy soils.
  • Spacing: Space plants 18-24 inches apart to allow for air circulation and to form attractive clumps.

Landscape Design Ideas

Swamp Milkweed is a perfect addition to rain gardens, wetland borders, or naturalized meadows. Its upright form and vibrant blooms make it a standout in pollinator and wildlife gardens. Pair it with other moisture-loving native perennials like Joe Pye Weed, Cardinal Flower, or Blue Flag Iris to create a dynamic and biodiverse wetland planting. Its deep roots also help improve soil structure and prevent erosion along stream banks.

Environmental Impact

By planting Asclepias incarnata, you actively contribute to the conservation of monarch butterflies and other pollinators. As a host plant for monarch caterpillars, it plays a vital role in their lifecycle. Its deep root system also aids in water filtration and supports healthy soil, making it a key species in sustainable gardening practices.

Add Swamp Milkweed to your landscape for its ecological value, stunning blooms, and the wildlife it supports. Perfect for enhancing wet areas or creating a pollinator haven, this native perennial is both beautiful and beneficial.

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Asclepias incarnata – Swamp Milkweed

$12.99$149.99
Frequently Asked Questions

What are the best growing conditions for Swamp Milkweed?

Swamp Milkweed thrives in full sun and prefers moist to wet, well-drained soil, though it will tolerate average garden moisture once established. It’s ideal for rain gardens, pond edges, wet meadows, and pollinator plantings where soils retain moisture or stay consistently damp.

How large does Swamp Milkweed grow?

Swamp Milkweed typically grows 3–5 feet tall and 1.5–3 feet wide, forming upright clumps with narrow, lance-shaped leaves and tall flowering stems. It adds height and structure to wildlife gardens, native borders, and wetland restorations.

When does Swamp Milkweed bloom?

Swamp Milkweed blooms in mid- to late summer (usually July through September), producing large clusters of fragrant, pink to rose-colored flowers that are highly attractive to pollinators. It may rebloom lightly if deadheaded.

Is Swamp Milkweed good for pollinators and Monarchs?

Yes—Swamp Milkweed is a host plant for Monarch butterfly caterpillars and a nectar source for a wide range of pollinators, including bees, butterflies, and wasps. It’s one of the most important native perennials for supporting Monarch conservation efforts.

Is Swamp Milkweed deer-resistant?

Yes—Swamp Milkweed is deer- and rabbit-resistant. Its milky sap contains toxic compounds that make it unpalatable to most herbivores, helping it persist in landscapes with browsing pressure.

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