For the first time ever, some chrysanthemums I put in near my front stairs last fall have come back in leafy glory. I had no idea I was supposed to cut them back until a friend told me, so I cut them back last week to about 4-6 inches high. Please advise me if I should cut them even further; I would be unhappy if they didn't re-bloom in the fall because I did something wrong. Thanks! I live in Roanoke, if that helps.