Blue Daze is a heat- and sun-loving, low-spreading tropical plant used as a summer annual, Pemberton said. The variety provides gardeners and homeowners summer-long flowers of a beautiful sky-blue hue.“It’s a true-blue flower and a long-established Texas gardening staple,†he said. “Blue Daze is very popular because its claim-to-fame blue color is a coveted color in the flower world.â€