Plants, Programs and Products for Horticulture Four Star Greenhouse produces superb young plants and finished crops for the wholesale grower, retail grower, garden retailer and professional landscaper. We are the #1 supplier of PROVEN WINNERS® plants and products worldwide, and are dedicated to providing the best plants, products, programs and services possible. As a founding member of the PROVEN WINNERS® brand, we invest strongly in research and development, and also breed many outstanding PROVEN WINNERS® and PROVEN SELECTIONS® brand plants. We’ve helped develop these plants because we know that growers, retailers and customers will be the most successful with top performing plants. Our PROVEN WINNERS® premium grower and retail programs include: PROVEN WINNERS® branded containers Professional fertilizers and water testing Consumer fertilizers and soil WATERWISE™ Home Irrigation Kits Merchandising