Calotropis procera (Swallow-Wort) is a species native to tropical Africa and Asia, more commonly known as Swallow-Wort. This small tree is usually between 10-20 feet tall, with large, grey-green leaves. Its blooms are pink on the outside and purple-tipped on the inside, each with a central purplish crown. These flowers grow in stalked clusters at the ends of its branches and its fruit is a grey-green, inflated pod about 3 to 4 inches. Inside each pod are multiple seeds with tufts of long silky hairs at one end.
Calotropis procera is generally a hardy and low-maintenance plant that is tolerant of both full sun and dry conditions. It should be watered moderately, but can also tolerate periods of drought. In cold regions, the Swallow-Wort can be grown in a pot if provided with a sheltered location and adequate winter protection. The plant should be moved indoors during cold spells to limit the risk of frost damage. During the warmer months, the Swallow-Wort should be placed in a spot where it can receive plenty of sunshine and the soil should be kept evenly moist.