Cacti, cultivated by people worldwide, are a familiar sight as potted plants, [[houseplant]]s or in ornamental gardens in warmer climates. They often form part of [[xeriscaping|xeriphytic (dry) gardens]] in [[arid regions]], or raised rockeries. Some countries, such as Australia, have water restrictions in many cities, so drought-resistant plants are increasing in popularity. Numerous species have entered widespread cultivation, including members of ''[[Echinopsis]]'', ''[[Mammillaria]]'' and ''[[Cereus]]'' among others. Some, such as the Golden Barrel dekha Cactus, ''[[Echinocactus grusonii]]'', are prominent in garden design.
Cacti are commonly used for fencing material where there is a lack of either natural resources or financial means to construct a permanent fence. This is often seen in [[arid]] and warm climates, such as the [[Masai Mara]] in Kenya. This is known as a [[cactus fence]]. Cactus fences are often used by homeowners and [[landscape architect]]s for [[home security]] purposes. The sharp thorns of the cactus deter unauthorized persons from entering private properties, and may prevent break-ins if planted under windows and near drainpipes. The aesthetic characteristics of some species, in conjunction with their home security qualities, makes them a considerable alternative to artificial [[fence]]s and [[wall]]s.
As well as garden plants, many cactus species have important commercial uses, some cacti bear edible [[fruit]], such as the [[opuntia|prickly pear]] and ''[[Hylocereus]]'', which produces [[Dragon fruit]] or [[Pitaya]]. ''[[Opuntia]]'' are also used as host plants for cochineal bugs in the [[cochineal]] dye industry in [[Central America]].