If yo have reeally crappy, sandy soil like me, an app or two of0-0-28 lesco blend willtoughen grass from fungus or traffic. Billbugs, so I hsve been told, are the worst pest here. I did get nailed by worms last year though. I have found pottasium and manganes will prevent an cure fungal disease in turf along with less water. I have been told k leaches faster in our soil than anything .