Well this is what I myself do... from the start of my girls... when they get a little older I start to break the stems.. like you take a stem in between your fingers and then smash it just enough to feel it crack.. Ive always done this and Im not sure if it helps at all. I dont wanna give false info and it sounds like your stems are WAY to weak to even think of trying this.. but maybe some superthrive would help you.. or just do what mountain said and get your lights closer...