The article reveals the results of the study of seed germination of Taraxacum kok-sagh?z Rodin and ?araxacum officinal? Wigg. plants at different temperatures. The optimal temperature was determined for seed germination having considered biological peculiarities of Taraxacum koksagh?z. On the basis of the results obtained, the seeds were suggested to be sown in open fields in the territory of Bustonlik district of Tashkent region