I usually follow the natural gardeners time lines and he says so. I already had the yard aerated and will probably just top dress a little bit as well as fertilize this month. But I noticed I need to adjust my sprinkler heads big time, they have sunk ino the ground
I wait until after I have to cut green growing grass once. I don't want to bury it before it starts growing. I am doing it for leveling purposes too so I have to put an inch or so down in some areas.