I'm not an expert however it is true. If you allow your grass to grow longer, more effort is going to the development of the roots which in turn will make your lawn healthier by being able to sustain water as well as fight off any diseases. As I said, I am not an expert! I know that when it gets very hot and humid here in NJ, my husband and I put the level of the lawn mover blades up so that the lawn is cut but the sun won't torch it. Therefore, our lawn is greener and healthier!
