Sea Holly is a very fancy thistle, and it really is this blue. An easy to grow perennial, it's long been a favorite in English cutting gardens, but will grow almost anywhere. The metallic blue flowers are 2" long on 30" stems, perfect for the back of a border. Cut them and more will appear. Sea Holly blooms its first year from seed and comes back every spring, soon forming a nice clump, but doesn't overtake its neighbors. The blooms make a long-lasting cut flowers and they dry nicely for wreaths