Stokesia Laevis Omega Skyrocket. This semi evergreen (herbaceous in cold climate) perennial is such a winner for the sunny border garden. With dense clumps of leathery green leaves all year round if you are lucky and dramatic aster flowers reaching for the skies it is no wonder it has become a favourite for many. The multipetalled delicate look aster type flowers are a soft lavender blue to deep lavender blue rising up to 50cm above the foliage in summer. If you remove spent flowers it will encourage move flowers to develop and prolong the flowering period. Great for cut flowers and tolerant of hot summers. What are you waiting for add it to your list!. Full sun to part shade. 60cm by 40cm.