Hi, im growing a white label northern lights auto fem, and am having a bit of a problem, im in my fifth week, and am seeing some very good growth and lots of flowers. But my tent is seeming to be a bit too short for my plant, and it has started to touch the light and scorch the top few leaves, is there any way i can stop upward growth so all the bud doesn't end up touching the light and burning before it gets a chance to grow?