This cactus can take decades to do this 🌵🌸 A flowering San Pedro cactus (Echinopsis pachanoi) is a notable and relatively rare event. These columnar cacti are slow-growing and long-lived, often requiring 10–20 years or more to reach sexual maturity, depending on genetics and environmental conditions. San Pedro flowers are large, white, and nocturnal, typically opening in the late evening and closing by the following morning. They are adapted for night pollination, primarily by moths and bats,