Abstract: The paper aims to discuss the possibility of wide cultivation of Iris germanica in Kunming, and then enrich the flower resource type in Kunming. Cultivation and blooming of 20 cultivars of I. germanica introduced from Holland were studied, and a grey correlation analysis was carried out on main characters of the cultivars. The experimental results showed that: I. germanica had a good cultural adaptability in Kunming, and the survival rate of most cultivars could reach above 85% . According to the grey correlation analysis, ‘Timescape’,‘Batik’,‘On Edge’and‘Rustic Ceddar’had a good correlation with ideal reference cultivars, so the four cultivars were recommended to be planted in Kunming.