Very attractive to butterflies, Apocynum cannabinum (Indian Hemp) is a perennial herbaceous plant of erect to ascending growth habit. It bears opposite, lance-shaped leaves, 6 in. long (15 cm), on upright, reddish stems. From late spring to late summer, dense terminal clusters of tiny, greenish-white flowers are visited by 19 species of bees and wasps, flies, butterflies, and moths. Butterfly gardeners grow Indian Hemp because it is a valuable native nectar plant. The fragrant flowers attract honeybees for nectar, making almost colorless honey. The blossoms are followed by long, 4 in. (10 cm), narrow pods that contain many silk-tufted seeds. Indian Hemp has an extensive, deep root and rhizome system that has been found as deep as 13 feet (4 m) below the soil surface and may extend up to 20 feet (6 m) in radial spread. Found throughout much of North America, Indian Hemp grows in open wooded areas, ditches, and hillsides. It is found in gravelly or sandy soil, mainly near streams in shady or moist places. It is used for the rehabilitation of disturbed sites and is also recognized as a worthwhile native landscaping plant because it can help suppress weeds.

• Grows up to 2-6 ft. tall (60-180 cm) and 2-3 ft. wide (60-90 cm). This species can become a serious weed as it is aggressive and difficult to control.
• Easily grown in average, dry to moist, well-drained soils in full sun to part shade. Prefers sandy soils. Once established, this plant is drought tolerant.
• A good choice for large spaces where this plant could roam freely, such as butterfly gardens, native plant gardens, and meadows.
• No serious pest or disease issues.
• All parts of the plant are poisonous and can cause cardiac arrest if ingested.  The stems contain a milky latex capable of causing skin blisters.
• Toxic to dogs, toxic to cats, toxic to horses.
• Native to North America.