Blue Hopi Corn makes great blue corn flour Perfect for blue tortillas You should try the blue pancakes Blueberry Muffins are outstanding with blue flour Hopi corn (Zea mays) is an edible blue corn variety used in a variety of specialty foods from blue corn chips to blue pancakes. Grown as an annual in U.S. Department of Agriculture plant hardiness zones 3 through 11, this warm season crop requires 85 to 105 warm frost-free days between 50 and 95 degrees Fahrenheit. The plants die in the fall after harvest and are replanted from seed in the spring. Plant Hopi corn outdoors in the spring when the soil temperature is at least 50 F.