We spent a bundle of $$ on sod four years ago when we built our home. The first few summers were so hot and dry that the lawn basically burnt up. It came back last year, but it is growing in clumps. It actually is growing in these little mounds that look like we have a huge dog! (We have NO pets.) Where the grass isn't growing in tufts, it is rather brown and looks matted down. Our lawn is hideous! It isn't just a few spots; the whole yard looks like this whether full sun or shade, back of the house and front and sides. We've recently had a commercial outfit look at it, but I think we're wasting our money. There is no difference. By the way, there are no weeds, but the grass is growing in random globs. Who can solve this problem with some much needed advice? We have agreed that if the problem is not remedied by August, we are tilling the yard under and starting over with fresh seed.