 So avoid cutting more than a third of the grass blade length at a time. And we also, again, recommend mowing in the morning to not stress out your lawn. And as always, we talk about this a lot, make sure your mower blades are sharp. This is especially important during the summer months. If your blades are not sharp, the grass tips can become frayed, and this is where the disease can set in, and then that opens a whole new problem for you.