Our neighbor has landscaping in the front of his house. The contractor put down weed fabric then stones over that. The stones are jr.pebbles a medium sized stone. He has had grass growing in this area for a while. I checked it and the grass is actually growing through the weed fabric. When you pick the grass you get the whole root mass too. but eventually it comes back, and he has grass growing there agian. Any ideal how to stop this? and why isnt the weed fabric stopping the grass. also, we have several other neighbors that have the same setup and have no grass growth.