This article discusses the agrobiotechnology of growing medicinal castor oil plant in the conditions of the Bukhara region. In addition, the
germination of castor seeds was carried out in laboratory and field conditions. It was found that the germination of seeds in the experimental version treated with a suspension of Chlorella vulgaris was 18-20% higher than in the control version. Alternatively, it was found that in castor seeds, the protein content in the experimental version is 18-21% higher compared to the control version, and the fat content is 45-59% higher.