This research aims to study the effect of a N,P,K nutrition on Red Ginger (Zingiber officinale Rosc. Var. Rubrum) in a polyculture system with rubber plants (16 year old). This research was conducted at the rubber research (-3,2325969, 104,6372518), Faculty of Agriculture, Sriwijaya University, Indralaya, Ogan Ilir Regency, South Sumatra. This research was conducted from November 2021 to May 20…