Now taking orders for spring 2024 – Orders over $99 ship free!

Close this search box.

Asclepias incarnata – Swamp Milkweed

Asclepias incarnata – Swamp Milkweed

“Swamp milkweed is an herbaceous perennial in the Apocynaceae (dogbane) family. Apocynum is the Greek term for “dog-away”. It is native to central and eastern United States and tends to grow in wet sites along streams, ponds, or bogs.

“Plant swamp milkweed in full sun to partial shade in soils with neutral to acidic pH. It is native to wet sites but adapts to drier sites in moist clay or loam soils.

“The attractive pink to rose-purple flowers mature in mid-spring and last into early fall. The seed pods split open to release seeds that float on the wind. Milkweed is an important food source for Monarch butterfly caterpillars and the flowers are visited by many pollinators.

“Use as an accent or border in a meadow, native, or pollinator garden. It will be at home in a naturalized area or along a pond or stream where it can grow up to 5 feet tall and spread 2 to 3 feet wide.” (North Carolina Extension)


Additional information


6-Pack, 9-Pack, Single

Common Name


Herbaceous Perennial



Native Range

Northeastern United States, Southeastern United States


3, 4, 5, 6

Height Range (ft.)

4.00 to 5.00

Spread (ft.)

2.00 to 3.00

Bloom Time

August, July

Bloom Description

Mauve, Pink, White


Full Sun


Medium, Wet


Fragrant, Showy



Suggested Use

Naturalize, Rain Garden


Clay Soil, Deer, Wet Soil


Product Description

1655 original - Asclepias incarnata - Swamp Milkweed

Baltimore checkerspot (Euphydryas phaeton) on Asclepias incarnata.

1. “Asclepias incarnata, flower. C & O Canal Park, Montgomery co., MD. (6/05/12)” by FritzFlohrReynolds is licensed under CC BY-SA 2.0
North Carolina Extension:  Asclepias Incarnata (Marsh Milkweed, Swamp Butterfly Weed, Swamp Milkweed) | North Carolina Extension Gardener Plant Toolbox Accessed 14 Feb. 2022.
Butterfly: “Baltimore Checkerspot (Euphydryas phaeton) on Swamp Milkweed (Asclepias incarnata)” by wackybadger is licensed under CC BY-SA 2.0
Type: Herbaceous perennial
Family: Apocynaceae
Native Range: Northeastern and southeastern United States
Zone: 3 to 6
Height: 4.00 to 5.00 feet
Spread: 2.00 to 3.00 feet
Bloom Time: July to August
Bloom Description: White, pink, mauve
Sun: Full sun
Water: Medium to wet
Maintenance: Low
Suggested Use: Naturalize, Rain Garden
Flower: Showy, Fragrant
Attracts: Butterflies
Tolerate: Deer, Clay Soil, Wet Soil



There are no reviews yet.

Be the first to review “Asclepias incarnata – Swamp Milkweed”

Your email address will not be published.