QuestionsHow to growLawnsFeedinglawn soil PH 0 Vote Up Vote Down louise lally asked 15 years ago We did a PH test on our lawn soil and it returned as 8.5PH. Is there anything we can do to take this level down to 6.5 or do we need to re dig and re sow our lawn? The lawn is 300metres sq. 1 Answers 0 Vote Up Vote Down Gerry Daly Staff answered 7 years ago Grass grows well all over the country at a wide range of pH, from 5 to 8.5, and there is no need to alter pH.