In the monograph botanical classification, origin, distribution and peculiarities of onion seed production in the conditions of Uzbekistan. Analyzed, the timing of sowing seeds, feeding and planting areas, the size of mother bulbs on the yield and quality of seeds. Experimental confirmed accelerated and non-transplanting method of obtaining seeds, also features of formation and maturation of onion seeds. Summarized the results of research on the potential and actual productivity of onion seeds, variability of some morphological, physiological, biochemical traits in the process of seed development, economic evaluation of seed growing at different sizes of bulbs. The book is designed for biologists, teachers, masters of biological and agronomic faculties of universities, as well as for amateurs engaged in the cultivation of onion seeds on farms and amateur farms of the Republic of Uzbekistan.