The golden barrel cactus is a globe shaped type cacti suitable for growing in conservatories, on patios or any other type of indoor glass rooms. The barrel cactus is primarily suited for growing in garden rockery settings, desert type landscapes, patios and botanical gardens. They are grown indoors inside conservatories or other glass rooms where enough sunlight is provided. However, they seem to have great difficulty flowering indoors. How they look: The globular shaped stem can grow up to 60 inches tall and 36 inches wide in the wild, or where they are given conditions similar to the natural Mexican habitat. This stem is ribbed and produces prickly yellowish spines (there is also a spineless type), and the crown of the cactus has white colored woollen hairs at the top. Flowering: The golden barrel cacti will produce yellow flowers during mid-summer, although these are unlikely to appear indoors. These are grown mainly for the foliage rather than flowers; for the desert look that's appealing to cactus growers and collectors.