After a new septic field was installed in my front lawn, all I had was clay. No grass over most of the yard. I added about 10 tons of topsoil, spread thin. No grass would grow, even after spreading 12 bags of fertilizer. A friend brought several bags of his grass clippings, which contained crabgrass. Believe it or not, I now have the thickest greenest lawn, mostly due to crabgrass. I'd much rather look at a green crabgrass lawn than clay! When I get some regular grass established, I will then go after the crabgrass, but not this year or next!
