 Even if you did everything right and it started to grow, the intense heat that follows a month or two down the line will burn it out and kind of ruin all the good work that you did. So I would spend the summer getting the information that you need to kind of come up with a plan. Now in terms of whether or not you remove the old sod or not, if it's really loose and disconnected and not really knitting and sort of sitting on top, then in that case I would take it out and then prep the soil below.