QuestionsHow to growLawnsMossmoss on lawn 0 Vote Up Vote Down paul devenney asked 14 years ago is it safe to have children and pets on lawn after sulphate of iron distribution,does dead moss need to be raked out. 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 7 years ago Once the sulphate of irion has been washed down, As a dry salt on the surface, it is an irritant.