Abstract: Based on analysis of annual seedling growth experiment of Toona sinensis leaf forest, the Logistic growth curve equation was used to analyze growth law at seedling stage. According to the growth rate of seedling height and ground diameter, the growth of Toona sinensis was divided into four different growth stages, emergence stage, early growth stage, peak growth stage and late growth stage. The results showed that the growth pattern of Toona sinensis leaf at seedling stage was“slow-fast-slow”. The growth was centered on the peak stage. The growth of seedling height accounted for 70.48% of the total growth and the ground diameter accounted for 78.05%.

Key words: the leaf vegetable of Toona sinensis, seed breeding, seedling height, ground diameter