If you desire the exotic, then Seashells are the cosmos seeds for you! The unique petals of this cosmos are shaped like tubed seashells – hence their name. Seashell cosmoses come in pastel shades of pink, rose, carmine and white; plus, they attract birds, bees and butterflies! Their tall stems reach 3 to 5 feet and have ferny leaves. The striking yet easy to grow Seashell cosmos flowers are the perfect choice for those looking to go off the beaten garden path!