Susan - can you explain limbing up your Buddleia - I twisted together the stems on mine last year to try and acheive a more tree like structure but it didn't look that good. Also my Purple Knight seemed to stay green through this winter, but I cut it back this weekend because I read that was what I was supposed to do - was this a mistake since it had not really died down? LAst summer was my first experience with this plant and I was not very impressed, but maybe that was because it was adn immature plant. I also read that they should not be fertilized as that would promote leaf growth and not flowers - what has been your experience? Tamara