The light turf has been present for many years. I have always been told pH was the culprit. Sulfuric acid in the injector, and sulfur pellets if needed... pH has tested from 8.2(spring) to 6.6 this summer; Around 7.1 now. Problem exists at all pH levels.
FYI: Core-aeration in spring/fall - Thatched in spring
Originally Posted by TLS
Was this light green turf present LAST October?
Was this light green turf present in July of this year?
And when were the two pictures taken above?
Get a close up of the green and light green blades for comparison.