There are many different methods I know of however I want to know what most pros do. I have been using ferrous sulfate wettable powder in a backpack sprayer and going back to rake it up. Since it is labour intensive and even involves a dump fee it is not part of my reg programs. I see a competator lists thier basic program as, 3 ferts, lime, moss control and an aeration. (This is a trad Pacific nwest prgm, just lime wont get the moss here) The prmg is the lowest price one at 180 or so. What can you offer for moss control in a case like this. Would you apply the liquid and not rake it up and overseed when it goes black? At that price it may be a granular with extra iron sold as moss control fert. I mean a dethatch and cleanup then overseed is great for a mossy lawn but thats a 250 dollar job buy itself, what are people using and doing when its part of your prgm?