Swamp milkweed is an erect, clump-forming, native plant commonly found in wet meadows and along riverbottoms. An essential plant for the rain garden. The flowers are a prime source of nectar for many butterflies.
- Deciduous (seasonally loses leaves)
- Chicago area
- North America
- Zone 3
- Zone 4
- Zone 5
- Zone 6
- Full sun (6 hrs direct light daily)
- Wet sites
- Occasional flooding
- Clay soil
- Moist, well-drained soil
- Wet soil
- Large plant (more than 24 inches)
- Mixed border
- Mid summer
- Late summer
2 to 5 feet high and 2 to 3 feet wide
Tree & Plant Care
Foliage is slow to emerge in spring.
Easily grown in medium to wet soils in full sun.
Plants have deep taproots and difficult to transplant.
Disease, pests and problems
Milkweed bugs and milkweed beetle are late season pests.
Native geographic location and habitat
Commonly found in swampy areas and wet meadows.
Attracts birds & butterflies
Small rosy-pink flowers is a great nectar source for many butterflies and leaves are the larval host for the monarch butterfly.
Leaf or needle arrangement, size, shape, and texture
Leaves are opposite, 2 to 6 inches long, lance shaped with pointed tips
Flower arrangement, shape, and size
Small, fragrant, pink to mauve flowers (1/4 inch wide), with five reflexed petals in a tight clusters (umbels) at the stem ends in summer.
Fruit, cone, nut, and seed descriptions
Long (4 to 5 inches) green seed pods (follicles) split and release light to dark brown seeds attached to silver-white silky hairs.