I had Trugreen come out and run an analysis on my lawn. The analysis said my clay soil needs airating but not to do it until fall. The soil is very hard and probably was abused for many years before I bought it 2 years ago. I think I will hire someone to come out and do it anyway. Trugreen has already applied a pre-emergant 3 weeks ago. Will the airating hurt the lawn? Their analysis did not show soil ph or other nutrient info so I tested myself with a cheapo test kit from Ace hardware. It said my soil was ph nutral and hardly any sign of nutrients like nitrogen. I figured Trugreen would have fertilized by now. Also since the pre-emergant was applied the dandylions and clovers and other weeds have grown to unusually large sizes Jurassic Park style. The dandylion flower parts do not bloom but the puffy balls are very tall, coiled with unusually thick stalks. When I mow them, they pop back up the next day! as if I never mowed at all. It seems very unnatural. Thanks, this is my first home. I'm trying to learn about lawn care.