A new customer called me to go look at his lawn. He told me that he had a perfect lawn before he applied a lot of fertilizer. A product called "vergo". he said he applied the first, and on the second time around he put a lot and got big brown dry patches in his yard? Is this from the product that he used or something else. I figured if it was the vergo all of his lawn would be messed up and not just parts of it.