The study aim to know active ingredients and a doses of pre emergence herbicides for suppressing weeds growth and its the effect on juvenile acacia three months after planting. The study was conducted in PT. Bumi Andalas Permai, The Sugihan Water District, Patch G 3020, The Baung River, Ogan Komering Ilir, South Sumatra. The study used a Randomized Block Design (RBD) and 8 treatments. Without P…