Mellow Yellows Coneflower (Echinacea purpurea) is a study in harmony with beautiful blossoms ranging from cream to gold. Blooming from early summer to first frost, Mellow Yellows has a long-lasting steady supply of blooms, making it an essential garden workhorse. Butterflies, bees, and birds are frequent visitors to Echinacea, and you can leave tall, sturdy flowers up over the winter for visual interest and food supplies. Beautiful for cut flowers on long, sturdy stems.