I currently have a yard about an acre and a half with around 30 full grown red oaks, with some other trees and shrubs. As you can imagine the grass don't grow too well!! The lady that owns the place won't hear of cutting any of her trees, but insists that the yard looked great years ago. The second problem is that most of it is on a hillside. The walkbehind will stay on it but newly planted seed won't (after the first rain). Any ideas??? Remember it's a hillside that I wouldn't take a ZTR rider on.