A: Plants have a remarkable ability to adapt to soil conditions. Turf expert Clint Waltz says established centipedegrass can tolerate a higher pH just fine. But to gradually lower it, use lawn fertilizers that contain ammonium nitrate or urea. Between normal environmental conditions and these acidifying fertilizers, the pH should decline over the course of a couple of years. Remember that centipedegrass is a light feeder. Only a couple of applications of fertilizer are needed per year.