QuestionsHow to growLawnsMowingNew lawn 0 Vote Up Vote Down Brian Rochford asked 15 years ago I have just sown a new lawn. Grass is starting to grow. When should I cut and if there are patches there the seed has not taken should I re/over seed. Finally Is it ok to roll the garden as there are a number of stones etc I would like to roll in… 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 6 years ago Roll down stones first. Cut the new grass at 7 or 8 cms back to 5cm and mow regularly. Re-sow patches if they stay bare.