what the heck is goin on? i have a few properties that have recently been overcome with moss. they all have clay soil. i aerate annually. the ph is 6.7. there is about 6 hrs a day worth of sunshine on them. the ONLY thing i see, that may be a problem, is that certain parts of these lawns seem to remain wet all the time. these are all back yards, and the front of these properties are picture perfect. on one of them, i even tore the entire back yard up last year, aerated like hell, and reseeded with a 3 way fescue. it is now covered about 25% with moss. any clue?