Hello to all. A client of mine had a tree well over 150 years old cut down over the summer. (Nice divit in the yard from that thing hitting the ground too ) The thing was a monster and hid most of the grass to sunlight for obviously some time. The moss mat is thick. It's as if the old moss is growing on the new moss. I have never dealt with this amount of stubborness. The local garden expert recommended using a high dose of nitrogen to kill it off. Suggestions? We have roto-tilled the yard, sprayed Quik Pro on three separate applications and it is still wanting to rear it's green mossy head. Some of it died with the Quik Pro, but I think it became food for the new stuff. I am about ready to skim over the landscape and remove about 6 inches of dirt over a 50x50 section if I can't kill this stuff. But the problem will still remain. The reason for the moss is because of the old tree AND the fact the neighbor has a tree on the other side of the street that shades that SAME part of the yard. That I can't change... Anyone have any suggestion to of a chemical that would kill this prior to me laying down seed by FRIDAY Sept 10??????