Purple coneflower (Echinacea purpurea) has it all—it's heat-, drought-, and disease-resistant, plus it attracts pollinators like bees and butterflies. Two varieties that are known for being especially hardy are Pow Wow Wild Berry and Pow Wow White. "They emerge in spring with a rosette of elongated leaves, quickly giving rise to stalks of brilliant pink or pure white daisy-like flowers," says Adrienne Roethling. "The center or cone are cinnamon in color and quite large—a pollinator's delight."