Lawn fertiliser mosskiller and fertiliser lawn treatment quickly and effectively kills moss in grass lawns. It also feeds the lawn, encouraging strong grass growth which helps prevent moss re-growth. Features kills moss in lawns. Fertilises lawns. Fast and effective. Ingredientsnitrogen (n) 12.6%iron (fe) 8.0%sulphur (s) 19.0%directions for useapply in fine, calm conditions onto a damp lawn. Either moisten the lawn before applying or apply on a dewy morning. Best results are obtained when the lawn is mown 2-3 days before treatment. Spread evenly at the rate of 35g per square metre (as a guide, a standard cup holds approximately 200g and will treat 6 square metres). If rain does not fall within 1 day of application, water the lawn thoroughly.The moss will blacken as it dies. The lawn may also appear blackened at first but will recover to a dark green colour after several days. After 2 weeks the dead moss can be raked out. Precautions - do not use on concrete as discolouration will occur. Accidental spillages should be brushed off immediately.