Abstract: In order to promote the mass reproduction and cultivation of Iris tectorum,with different concentrations of GA₃(50,100 and 150 mg·kg^-1)and warm water as control,the effects of self-made willow branch lixivium for different treatment time（12 and 24 h）on the germination rate,germination potential,seedling height and root growth of iris were studied.The results showed that:the germination rate of seeds treated by willow branch lixivium for 12 and 24 hours could be effectively improved,with the germination rate 97.00%,which was 2.11% higher than that of 150 mg·kg^-1 GA₃ soaking for 12 hours.Compared with different treatments′time,germination potential of willow branch lixivium for 24 hours was 19.30% higher than that of 12 hours treatment.The germination time of seeds soaked in willow branch lixivium was about 1.0 dearlier than that of the treatments by gibberellin solution.The growth and development of seedlings from the seeds treated by the willow branch lixivium was significantly promoted,whose seedling height and root length were significantly higher than those of seedlings from the seeds treated by warm water,which almost had the equal promotion effect on seedlings from the seeds treated by 50 mg·kg^-1 GA₃ for 24 hours.