The purpose of this study is to investigate the utilization of agricultural waste such as rice husk, bark, and coconut husk to propagation media. As rice husk has property of shedding water, water retention is poor. Therefore, the rice husk charcoal or the crushed rice husk has to be produce for raising of the combination with water. The processing of rice husk consumes energy. This paper is to examine characteristic of the propagation media that consists of only rice husk. The similar experiment was carried out to compar with the propagation media which consist of other organic waste. As moisture characteristic of propagation media influenced in the growth of plant, water retentivity index and water conductivity index of each propagation media were determined using the centrifugal method. The result showed that there was little available water in the rice husk. The eight kinds of cultivation bed filled by different propagation medium was made, and sweet potato was grown for 4 mouths. The hypertrophy of sweet potato grown the media consist of rice husk was observed after harvest. The root grown in rice husk media penetrated into the soil under the cultivation bed because of supplement of water deficit. The growth and hypertrophy of sweet potato were promoted by mixing soil and waste. The hardness and air permeability of propagation media influence for yield of sweet potato. In the future, it will be necessary to carry out the experiment considering these factors.