I am in the midwest, curious about this element I realize that watering and cutting height are two separate things. If I water deeply and somewhat infrequently, I should be able to encourage the grass to grow deeper roots. I think I have also read that root depth tends to be related to how high the topgrowth grows...i.e. if the topgrowth is 3" tall then the roots tend to go about that deep Is that true? Does cutting height affect root depth? or is it 90+% controlled by watering? I've read repeatedly that you don't want to cut more than 1/3 of the topgrowth at any time...but I wonder -- if cutting height does affect root depth, wouldn't it make sense to allow the lawn to grow tall a few times? or is this just completely off-base?