Market conventional system given organic waste can be used for liquid of organic fertilizer. The research of liquid of organic fertilizer was carried out on Setaria Splendida Stapf that defoliated at different ages. The design used is a Completely Randomized Design. The treatments given are 3 (three) mixtures of liquid of organic fertilizer with water, namely 1: 1, 1: 2 and 1: 3 (liquid of organic fertilizer: water) and defoliation age, 35, 40 and 45 days. Each combination treatment was repeated 3 times on a 1 x 2 meter plot. The agronomic parameters observed were plant height, number of tillers, number of leaves, area of canopy and weed growth. The results of the study were analyzed by means of a Completely Randomized Design, continued with a regression test. The results of the analysis show that the older defoliation age shows the agronomic aspects of Setaria Splendida Stapf grass which are getting better while the doses of liquid of organic fertilizer are getting runny, the growth rate decreases. The best agronomic level obtained at the age of defoliation is getting older (45 days) with fertilization from liquid of organic fertilizer resulting from more concentrated waste of market conventional system (1:1).