Abstract: The potential of cane molasses and whey as additives to ensile maize plants (Zea mays Linnaeus) was investigated. Maize stem plus leaves were chopped, mixed with cane molasses and whey, placed in cylindrical plastic containers, hermetically closed and characterized. The pH of the silage decreased significantly in each of the treatments with a faster decrease found when whey was added. The lactic acid concentration was > 60 g kg-1 in silage amended with molasses and/or whey and 41 g kg-1 in the control treatment after 15 days. Acetic acid was the only volatile fatty acid detected in the silage of maize and its concentration was 7.3 g kg-1 when whey was added, but 16.2 g kg-1 in the control treatment. In conclusion it was shown that maize plants can be effectively ensiled with whey in combination with sugarcane molasses as additives inducing a faster production of lactic acid and resulting in a better silage product.