I need help. I started a new lawn. I did it exactly how you recommended and the grass came up beautifully. After the first mowing I noticed spots of what looked like fuzz on some spots. There was some pink spots. Then that area died. So now I have all these spots on my lawn. What caused this to happen. Please send the answer to my email. Thank you so much.
It sounds like a fungal disease which were worse than normal this year due to excess moisture. You were also likely watering the new grass extra. In spring you can scratch up the damaged area with a metal and reseed. Water as needed to get the seeds to germinate but then, once they are tall enough to mow, stop any extra watering and treat the area the same as the rest of your lawn.