Family: Cactaceae
Common Name: Barrel Cactus

Originating from Mexico and the southern parts of North America, these medium to very large barrel-shaped cactuses have vicious spines and thick, prominent ribs. Large, bell-shaped, red, purple or yellow flowers are borne at the top. Most species are solitary growers but some are clump forming.

Species

F. cylindraceus has a solitary stem, up to 3 m (10 ft), and yellow to orange flowers. The long, curved spines are generally a yellow­ish colour, though sometimes red.

F. glaucescens is a flattish, round plant, to 30 cm (12 in) across, with a blueish bloom. It has six to seven sharp ribs, yellow spines and yellow flowers.

F. latispinus is popular, growing 25-30 cm (10-12 in) high. It has a flattened, round shape, acute ribs and white, red, pink, purple or yellow flowers. Some of the spines become broad and red, and the lowest ones are hooked.

Cultivation

In hard frost areas, grow in an airy, intermediate greenhouse or conservatory, in pots of cactus compost, and provide maximum light. Do not water in winter, but water regu­larly in the growing period. Propagate from seed and germinate at 20°C (68°F). Outdoors, plants need full sun and well-drained soil.

Climate

Zone 9.