This research aims to determine the interaction and main influence of banana hump POC and mono potassium phosphate on the growth of jengkol plant seedlings. This research has been carried out in the Experimental Garden of the Faculty of Agriculture, Islamic University of Riau, Jalan Air Dingin, Air Dingin Village, Bukit Raya District, Pekanbaru City, Riau Province. This research has been ca…