i just let it grow. It actually does nice things ( like covering up the side yard i keep forgetting to get to and dont really know what to do with) and it does have pretty flowers. I like their fragrance too. For me i let it stay. But you can apply roundup to the axis where their leaves join the root very carefully with a paint brush. ------------------------------------------------------------------------ -------------------------- "Ambushing me first thing in the morning?!" -------------------Akane Tendo to Kodachi Kuno in ranma 1/2 vol. 2--------------------