Is this the cause for no growth from grass under trees? Or is it another problem? I have a few clients that I cannot seem to get grass to grow around trees, (20ft radius). I know shade could be an issue but I have clients with extremely shaded areas that grass grows just fine if not better. I've had a swimming pool tech tell me to put lime down to level the lime/acid levels in order to grow grass, I question this because he's a pool tech and not a LCO, but then I second guess it because he knows his chemicals and may know what he's talking about.