The Saguaro cactus can be seen blooming in Phoenix from April to June. The flowers actually bloom during the night when it is cooler than the day time temperatures that get such high heat during these months. These flowers, like most in the plant world, turn into fruit. In this case ruby red fruit that can contain some 2000 seeds and attracts animals with a sweet taste and smell. Read more about Pheonix, Arizona: Saguaro Blooms