This research aims to determine the effect of sludge palm oil waste on the growth of cocoa seedling (Theobroma cacao L.) in medium of subsoil Dystrudepts and get the best dose. This research was conducted in October 2014 until January 2015 in the experimental station on the Faculty of Agriculture, University of Riau, Bina Widya Campus Km 12.5 Simpang Baru Village, Tampan District, Pekanbaru. Th…