QuestionsHow to growLawnsSowingdead lawn 0 Vote Up Vote Down charlie cronin asked 8 years ago all of lawn mistakenly sprayed with Rosate 2 weeks ago. can I scarify now and overseed? 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 6 years ago Rosate is a glyphosate spray adn kills grass. You can mow as tightly as possible and sow over the dead/dying sod and simply brush it inwith a yard brush, no need for scarifying if you wish.