WPM medium was chosen as the basic medium and a few of factors including the concentration of 6-BA,NH_4~+, agar and sucrose were investigated on vitrification of plandets from Leucadendron‘Kervin red'.The results showed that the concentration of 6-BA and NH_4~+were the main factors that had significant impact on vitrification of plandets.Using lower concentration of cytokinin(6-BA0.1 mg/L) and half the concentration of NH_4~+in medium effectively reduced the vitrification rate.