This unusual Buddleia is not at all like the rather beefier Buddleias we usually think of. It has panicles of elegantly delicate deeply purple flowers opening from velvety grey buds in late summer into autumn.  It grows as a beautiful arching fountain of flowers and is perfect grown alone or arching over a low wall.  It grows to H&S of 6'. Plant in full sun in fertile, well drained soil. 2 litre pot.