Abstract: An L9(33)orthogonal experiment was used to optimize the conditions for the sticking of Syzygium samarangense.The results showed that the highest root survival rate could be reached if the growth regulator,IBA,was applied at 400 mg·L-1for 10 min;the greatest number of roots was found when the application was 600 mg·L-1for 10min;and,the longest average root length was achieved when the application was 400mg·L-1 for 30min.It was concluded that the most desirable overall effect,i.e.,a root survival rate of 90%,16.6 roots per plant,and 7.43cm in root length on average,could be obtained with a pre-soaking of S.samarangense cutting in a 400 mg·L-1IBA solution for 10min prior to the sticking.