Mulch season in Central Ohio has about four weeks left before it is not worth doing until fall. The window opened in early April and closes right around Memorial Day weekend, and the longer you wait inside that window, the less return you get on the work. Here is what that means for your property in Circleville, Columbus, Lancaster, or Chillicothe, why the window matters, and what to get done this week. Why the window closes at the end of May Fresh mulch does four things for