Pilocereus azureus, commonly known as the Blue Pilocereus, is a striking cactus species native to the arid regions of Brazil, particularly in the Bahia and Minas Gerais states. This impressive cactus is characterized by its tall, cylindrical stems that can reach heights of up to 10 feet (3 meters) and are renowned for their vibrant blue-green coloration, which is particularly pronounced in younger specimens. The Blue Pilocereus features prominent ribs adorned with clusters of short, sharp spines, providing both aesthetic appeal and protection from herbivores. Thriving in well-draining, sandy soils, this species prefers full sun exposure and is well-adapted to dry, desert-like conditions, requiring minimal watering once established. In late spring and early summer, it produces stunning white to pale yellow flowers that bloom at night, attracting nocturnal pollinators such as moths. Following flowering, it may develop small, edible fruits that can be enjoyed by wildlife. As a member of the Cactaceae family, Pilocereus azureus is not only admired for its striking appearance but also plays a vital role in its native ecosystem, providing food and habitat for various desert species.