Sweet potato, Ipomoea batatas (L) Lam is a dicotyledonous plant with creeping vines and vegetative covering, and this can help in smothering weeds. Twenty-eight lines of sweet potato were evaluated for different quantitative characters such as number of vines, number of leaves, number of nodes and length of vine; and for qualitative characters of vine colour, leaf shape, and leaf colour in relation to tuber yield. Analysis of variance was used to know the significant effect of blocking and treatment on the various traits evaluated in relation to tuber yield. Correlation analysis was also carried out to determine relationships among the quantitative characters evaluated. Results showed that there were significant variations among the lines evaluated. Treatment was also significant on the characters evaluated at intervals. The correlation analysis showed that there was linear relationship between the number of leaves and number of nodes, days to 50% flowering, yield/plant and yield/plot; which implies that increase in the number of leaves is directly proportional to the number of nodes on the plant. Qualitative characters such as green vines and green petiole, which increases radiation interception also contributed significantly to biological yield of sweet potato.