Ive been working since spring to get the brown dead growth out of this Zoysia lawn in the Nashville, TN area. Weve had a fairly damp spring and the temperatures are reaching the upper 80s and low 90s so it cant be temperature or drought related. Ive de-thatched, fertilized but none of it seems to be working. I even dropped my deck height to 2.5 in hopes of cutting out the brown but its still there. From a distance the lawn looks nice and green but when you look straight down you see the dead grass. Ive also noticed that some of the grass just doesnt seem to be growing after its cut. After the grass has been cut a week some blades have grown an inch or more while other blades havent grown at all and still have a brown tip from being cut. The only think I have not done to this lawn is lime it. It also appears that I need to encourage lateral growth. It just isnt as think as a Zoysia lawn should be. Any ideas on what might be the problem or what I can do to remedy the problem?