This clematis flowers over the whole summer period from june until september with a big display of gorgeous large violet blue flowers with contrasting red anthers in the centre clematis viticella 39xerxes39 or often called 39elsa spath39 has a moderate growth habit making it suitable for growing amongst mature shrubs or up against a wall or fence the plant looks great growing up a white painted fence or wall as the darker flowers will contrast with it height 3m 401039