There is this one house in my area that the grass is getting white on the top (pictures attached). I was wondering what it is...is it the grass seeding? Is it that the mower that the guy uses has dull blades?
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Ask the owners if they have had the lawn treated recently, that is possibly a chemical burn. I know that here that happens frequently a day or two after a company like True Green comes through and treats the lawn, especially if they treat in the heat of the day.