We have Bermuda on our football field. Problem is we are in Southern Indiana and we get pretty cold in the winter. How should the cutting height be from here to the when it goes dormant? Last couple years I have raised the height the last month for more ground cover and insulation during the winter. I just hate to see all the thick dead grass when spring comes even though the Bermuda seems to recover ok. Any suggestions or are we going in the right direction.