I have a lawn that is 2 years old.  Very thick (KBG,Rye,&Fescue).  I am thinking to cut it at 2 inches before it starts to green.  The frost went out today (3/8/2016).  I normally cut it at 3 inches and right now the height is 3.5 to 4.  I also plan to bag.  My question is should I take more off or stay at 2 inch height.