A friend of mine is having lawn troubles, much browning taking place in patches and also, more alarmingly, in strips along the mower tracks. The mower has been checked and serviced and it's fine. The strips and patches could be a fungal disease like red thread but appear to me to be nothing more than thatch. This thatch is about 2 inches deep.
He's been employing a lawn treatment firm who have been feeding the grass 4 times a year for the last two years with, presumably, a very high nitrogen feed because the growth following their visits is incredibly rapid and lush.
My theory is that they are causing the problem in that the lush growth is a/ producing thatch and b/ stopping good circulation of air.
Does this make any sense? Has anyone else experienced problems with these lawn feeding firms.
ps I'm no lawn expert - it's far too complicated