Weed Control Greenhouse and Headhouse – UGA 4619 (1963, Category 2). The Weed Control Greenhouse and Headhouse is located near the eastern end of Tobacco Road. The headhouse is a one-story concrete block structure oriented perpendicular to the road. It has a gable roof with new metal roofing, and metal windows with two awning sash and are set in masonry openings with concrete sills. The long greenhouse is attached to the rear. The building retains integrity and is assessed as Category 2.