Datura double purple, the Horn of plenty or the Downy thorn apple, is a member of the Soanaceae, or nightshade family. It grows 3 or 4 feet tall and origins of Central America. More compact in container. Normally treated as an annual, the plant can be over-wintered in a greenhouse environment. A very beautiful, very interesting looking plant. Frilly, double, midnight-purple fluted horns or trumpet flowers, with white interiors burst open in profusion throughout the Summer, commonly 12-18 cm long. Very fragrant at night and a good part of the morning. The plants will start flowering when they are about a foot tall. The leaves are ovate, large, dark green, 25 cm long, 20 cm wide; sometimes with purple stems. The fruit is prickly or spiny. It seeds prolifically. Remove seed pods regularly to encourage further blooms. All parts of plant are poisonous if ingested. Hardiness zones 7-11, (-15øC/5øF, 4øC/40øF) in Winter. Perennial in zone 11, annual elsewhere. They thrive in rich garden soil. Flowering and growth is most pronounced in partial sun to full sun, and rich soils that get regular waterings. Do not feed plants, but water well.