It does help as you seen. Cannabis and most plants will eat off of their leaves to build new roots or repair damaged ones. Many times when growers see lower fan leaves yellowing, they think deficiency, when in fact it is usually the plant eating leaves to grow or repair roots. Keep observing as that's how you learn. If others criticize, worry not and apply what works best for you no matter what. If your a new by, I will not try to fill you with too much now but also consider organics whenever possible so study up and use hid instead of HP's " don't care what anybody says and you will thank me" and give your trees a minimum of 15-16 weeks and don't boggle around on too many forums as you can be lead to not know your left from right. If your an observer and not afraid to learn from mistakes and find the reason the mistakes happened, you will be a top shelf grower and you will learn yielding techniques as you go along. Most important at first is learning to grow quality healing meds that will clog the joint after three hits and make your mouth water and take you off earth for truly a good six hours when smoked. Organics hid and patience in ripening, will get you going in a better direction than most, if willing to listen. Scroll around and learn what's good but if you find something good that works, don't expect to always find a welcoming committee for your new horizons lol. One love, rev.thenatural