Echinocereus pectinatus, commonly known as Rainbow Cactus, is an evergreen succulent native to the desert regions and rocky slopes of the southwestern United States, particularly New Mexico and Texas, as well as northern Mexico. This cactus typically grows to a height of 0.5-0.6 feet (0.15-0.18 meters) and a width of 0.3-0.4 feet (0.09-0.12 meters). It is characterized by its cylindrical form, with numerous spines that can exhibit a range of colors, giving it the appearance of a rainbow. The Rainbow Cactus blooms in late spring to early summer, producing showy, funnel-shaped flowers that are usually pink or magenta. These flowers are followed by fleshy, red fruits that are attractive to birds and other wildlife.

The Rainbow Cactus is valued for its unique, colorful spination and vibrant flowers, making it a popular choice for rock gardens, xeriscapes, and as a potted specimen in areas with cold winters. It is well-suited to cultivation in arid environments, requiring minimal maintenance and water once established. Gardeners should provide it with a well-draining soil mix and full sun exposure to mimic its natural habitat. While generally disease-resistant, overwatering can lead to root rot, and it may be susceptible to pests such as scale insects.CC BY-SA 4.0