hey guys.im not sure if this is normal or not.i am growin 1 white widow 2 northern light xbig bud and 1 indoor mix plant i got from gypsy nervana.i am in my 5thweek flower.plants are budding nicely,but the bottom fan leaves are turning yellow and falling off.i have read that that is normal but not sure i want to here from the pros.here are some pics