Established in 1977, Holtkamp Greenhouses offers a range of plants. The company sells poinsettias, begonias, African violets, ferns, foliage and dish gardens. It provides a variety of plant care products under the Optimara brand name. Its plant care product list includes self-watering systems, fertilizers and peat moss. The company also offers various flowering plants, including nargit, harlequin, angelica, susi, scarlet and rita, as well as plants from Iowa, Manitoba, Alaska, Arkansas, Chagall, Juliana, Kentucky and Montana. It offers various special promotional items for Valentine's Day, St Patrick's Day, Easter, Mother's Day, Halloween and Thanksgiving. Holtkamp Greenhouses provides research and development services and is located in Nashville, Tenn.