A group of Nebraska gardeners are visiting Knoxville Saturday to tour a number of gardens in the area. Omaha Garden Club bus tour chair Duane Iwen says that 108 gardeners will spend Saturday in and around Knoxville. During the day-long tour, they’ll visit the Bessie Spaur Butterfly Garden, Brooks Garden, and a number of private gardens. The visit was organized after Iwen found a brochure for the Bessie Spaur Butterfly Garden in northern Iowa.