Moss grow due to the poor growing condition for your lawn. And it is an indication that the turf is not growing well. It is important to consider that moss does not kill the grass, it simply creates unfavourable growing condition such as shade, poor drainage, poor fertility or compacted soil. So if you want to Kill lawn moss, you need to focus on improving conditions for growing grass. You can also use sulphate of iron or other chemical control for short time effects on moss. The condition that is commonly associated with the most growth and their cultural control is described below in this article.