Hi! One of my new customers has major moss problem, I never had to deal with this yet. So, to make a long story short... What should I do first: apply moss control then pre-m. Is it a good time to work on moss? When should I overseed the area? The place is in 90% shade and hilly and no standing water, also they have a dog there, but willing to keep him inside for a few days 'till it rain... Thanx!