: Mustard plants growing desire for loose soil, fertile, and well drained. Husk fuel is porous planting medium and sterile that can be added to the mustard plant growing media in an effort to increase production. The purpose of this study is to determine the effect of husk fuel to the growing media on the growth and yield of mustard (Brassica juncea L.). Research has been carried out in November 2012 to January 2013. Research located in Pondok Benda, Pamulang district that is 44 m above sea level. Complete research using randomized group design (RKLT) with four treatments and five replications. Each experimental unit consisted of four plants, so there are 80 plants. Further tests using Duncan's New Multiple Range Test (DNMRT) at the level of 5%, where the analysis of the data is transformed to √x+0.5, through 6:07 Sirichai Statistics version. The study states P2 treatment (addition of husk fuel into the planting medium with a ratio of 2:2) shows the plant height, number of leaves, leaf length, leaf width, fresh weight, and the weight of the highest consumption compared to the treatmentP3, P1, and P0. P0 treatment (no additional fuel husk into growing media) shows the results of plant height, number of leaves, leaf length, leaf width, fresh weight, and the weight of the lowest consumption. Key wors: husk fuel, planting medium, mustard plant.