Oklahoma Proven is a plant evaluation and marketing program developed by the Department of Horticulture and Landscape Architecture at Oklahoma State University. An advisory committee comprised of representatives from state agencies, industry, and Oklahoma Botanical Garden and Arboretum Affiliate Gardens makes plant recommendations to an executive committee which in turn selects one tree, shrub, perennial, and annual for promotion each year. Trees and shrubs are selected 3 to 5 years ahead of promotion while perennials and annuals are selected 1 to 2 years in advance to give nurseries time to increase production. Marketing includes posters, billboards, pot stakes, and hang tags with the Oklahoma Proven logo and related extension service programming and news coverage. Consumers appreciate having help selecting plants and one retail nursery reported an 81% increase in sales of Oklahoma Proven plants. Funding for the program is provided by industry, Oklahoma Agricultural Experiment Station, Oklahoma Cooperative Extension Service, and a grant from Oklahoma Department of Agriculture.