These ripen into edible, juicy, crimson fruit in. June-August. The fleshy fruit, bearing hundreds of tiny black seeds, is encased in a sturdy pod. Saguaro fruit has a. The saguaro (Carnegiea gigantea) is an arborescent (tree-like) cactus species in . The fruits are edible and prized by local people.Growth · Flowers · Nests · Location. The bright red fruit of the saguaro cactus are ripe and ready for picking - a certain sign that monsoon season is on its way. After he finished leading a workshop in saguaro planting Saturday, the Arizona Daily Star sat down with John Rhodes to ask him a few more questions about.