A feeding trial was conducted to test the efficacy of fresh green guinea grass (FGGG) as green food supplement on growth response of grower pigs. A total of 45 young pigs between 18 and 19 kg live body weight on the average, were used in a completely randomized design (CRD) experiment. The pigs were obtained from a landrace x large white crosses. There were five treatments of nine animals each replicated three times with three animals per replicate. Pigs in treatment 1 taken as the control consumed only a formulated basal diet while pigs in treatments 2, 3, 4, and 5 received the basal diet in addition to 5, 10, 15 and 20% of their daily ad libitum feed as FGGG respectively. The whole experiment lasted for 60 days. At the end, pigs that fed 5% FGGG had better final body weight, than the control and other pigs that fed FGGG. Inclusion of FGGG above 5% did not better result in body weight than the control.