The lesson learned is don't put too much seed down in one area. If you do, the grass grows up into a mess of dense fine strands that look more like moss than grass. The grass strands are too week to stand up on their own; so then they just fall over and prevent the water from getting to their own roots. The closest way I can describe it to you is if you've ever seen soggy alfalfa sprouts, they look similar to that. However,the grass seed that I planted more sparingly over a larger area, grew up into strong healthy blades.