Cereus tetragonus is a slow-growing columnar cactus native to America with arching branches that resemble the towers of an ancient castle. A mature plant can grow up to 6 ft (1.8 m) tall. Interestingly, experts can attribute the cactus to one of the forms of Acanthocereus tetragonus.
Fairy Castle Cactus has wide pentagonal stems with small spikes, and its limbs are bright green in color. After some time, new branches form on the plant, which grows and create an attractive shape.
The cactus blooms after it is over 10 years old, and its flowers are largely yellow and white.
This plant is common, so you can find it in any store. If you see flowers on the cactus, it is probably done in an unnatural way, in which case you can either carefully remove it or wait for the flower to fall off.