Currently growing a few varieties on a 14" vertical trellis, and they have already surpassed the top! In the past, I've just let them keep growing up and eventually back down, tangling with the rest of them. This year id really like to keep the varieties as separate as possible to isolate them when harvesting, but if they keep growing they will start mixing up with each other. If I crop the top of the plant at the peak of the trellis to stop further climbing, will this negatively impact it's maturation?