The grass will put most of that energy into top growth -- which will increase its need for mowing and watering, plus divert energy from the root development that helps cool-season lawns get 
(The grass; will put; most of that energy; into top growth) (the root development; helps; cool-season lawns get) Context(the root development helps,List([136, 167))):(cool-season lawns; get; )
the root development helps,List([136, 167))
The grass the root development cool-season lawns
will put helps get
most of that energy into top growth
cool-season lawns get