The Saguaro cactus is a large, iconic cactus native to the Sonoran Desert in the southwestern United States and Mexico. It can grow to be over 40 feet tall and live for more than 150 years. The cactus has a distinctive appearance, with tall arms that extend upward, resembling a person raising their arms. Saguaro cacti bloom beautiful white flowers in late spring, which open at night and close by the next afternoon. These flowers are important for local wildlife, as they provide nectar for birds and insects. The cactus also produces red fruit, which is edible and can be harvested for food.