Phosphorus is an important element that affects the generative development, seed and fruit quality of plants. This study was carried out under the ecological conditions of Kahramanmaras province of Turkey to determine the effects of different phosphorus doses on the vegetation, yield, and quality characteristics of black cumin. The experiment was carried out in the field of the Field Crops Research and Application Department of Kahramanmaras Sutcu Imam University Faculty of Agriculture in the winter growing seasons of 2017-18 and 2019-20 periods, according to the Randomized Complete Block Design (RCBD) in 3 replications arranged in split plots. Two Nigella genotypes, one of which is a registered variety (Cameli variety), and five different P doses (0, 3, 6, 9, 12 kg da-1 ) were used in the study. According to the research findings, while phosphorus doses did not have a significant effect on plant characteristics such as number of branches, number of capsules, plant height, it was determined that it affected the number of seeds in the capsule and seed yield. The highest number of seeds per capsule (128.23 capsule-1 ) was obtained from the highest P (12 kg da-1 ) application, and the highest seed yield (136.04 kg da-1 ) was obtained from the 6 kg da-1 P application. Significant differences were observed in doses and genotype × dose interaction in terms of quality characteristics.