Curious if other growers of Pamianthe peruviana ever have issues with invasiveness in a greenhouse setting? Despite best attempts to harvest seed, it seems to happen every year a pod or two are missed and eventually the seeds are blown all around the greenhouse. Thought this species was supposed to be on the difficult side, yet they seem impervious to herbicides and quite frankly I'm getting tired of ripping these out of neighboring pots. Surely another grower on PBS has found a suitable method for controlling this species? Just ripped another few dozen out - http://imgh.us/IMG_4445.jpg Regards, Colin Northern California
