I have a new client interested in removing all the zoysia grass from their lawn and replacing it with a more desirable turf grass. I live in Indiana so typically we go with cool season grasses. It is a house in a subdivision built in a golf course. It is well irrigated and has very steep hills. First off, how do I get rid of the zoysia? Second, what kind of grass do I replace it with? Third, sod or seed?