The effects of CO 2 enrichment on ornamental plant production are reviewed. CO 2 enrichment enhances the growth and development of most floral crops. The cut flower and cutting production of main floral crops and the quality of potted flowers are both improved, and the root development of cuttings is also influenced by CO 2 enrichment. The resistance of plants against rough environmental conditions is strengthened, and the survival of seedlings and rooted cuttings during transplanting is thus improved. T...