What type of grass is best for growing in heavy clay?
By far, the most well adapted grass for clay pan soils is buffalo grass. It forms a dense mat and spreads to fill in. The roots branch and are fine. Mowing and grazing increase its spreading and matting behavior. It does best where other grasses fail. It must have full sun so south facing dam would be a benefit for it. You might consider a blend of seed. The most adaptable will ultimately prevail.
I second Mike's rec for liming.
