It's Arbor Day and in Iowa the Emerald Ash Borer has a lot of people thinking about diversifying the trees in their landscape. On this "Horticulture Day" edition of Talk of Iowa Charity Nebbe talks with DNR District Forester Mark Vitosh about the work being done at Iowa's State Forest Nursery and how to pick the right tree to plant in your landscape. Iowa State University Extension Horticulturist Richard Jauron also joins the conversation and he and Mark answer listener questions about plants and trees.