In this study, three greenhouse farms in Wonju (northern), Seosan (central), and Jeju (southern), which are main producing regions of lilies, were selected, and the impact of regional cultivation environmental factors on the quality of lilies were investigated with cut flowers of Oriental Lily ‘Siberia’. Greenhouse environments such as temperature, humidity, and integrated light have been analyzed since January 2016. The correlations between climate factors and cut flower qualities were determined. As a result, the vase life had a highly positive correlation with dew point (r = 0.73***). The temperature had a negative correlation with flower stalk length (r = -0.80***), while a positive correlation with flower bud size (r = 0.67**). Effect of Integral light intensity on the cut quality and vase life was not much higher than temperature. These results confirmed the importance of greenhouse environmental control to produce lily cut flowers qualified for export.