In this paper, we observed and recorded the phenological periods, the occurrences of diseases and insect pests and the adaptabilities of 15 ornamental plants introduced to Datong area of Shanxi province. These 15 plants were Buddleja alterniflora, Tartar Lonica, Prunus cerasifera cv., Lespedeza bicolor, Nepita calaria, Asparagus officinalis and so on. We also determined the physiological indexes of the resistances to stress during different phenological periods. The results showed that the 15 kinds of ornamental plants had strong adaptabilities to the ecological cultivation conditions in Datong area and could maintain the high ornamental values. Among these 15 kinds of garden plants, Lonicera tatarica, Buddleja alternifolia, Euonymus phellomanus and Prunus cerasifera cv. had stronger resistances to stress than the other plant species, and Nepeta cataria, Asparagus officinalis, Ligusticum sinense also had the good resistance performances. These plants could be popularized and applied to landscaping in Datong area.