The differences of corresponding relationship of floret numbers and morphological traits under different cultivation density were studied for Impatiens balsamina L.,the results would provide references to the cultivation and character election of balsam.Seedlings were grown under the cultivation spacing of 30cm×30cm and 50cm×50cm. Plant height,ground diameter,crown diameter,leaf area,florescence,floret diameter,primary branches number,secondary branches number,primary branch height,secondary branch height,and floret number were observed and recorded.The correlation and path analysis of ten major traits to floret number per plot were conducted.The primary branches number,secondary branch height with floret number showed a significantly positive correlation,and ground diameter,crown diameter and secondary branches number with floret number showed a significantly positive correlation at the 30cm×30cm spacing.The influence order of of morphological traits on floret number was the secondary branches number>the primary branch number>florescence>floret diameter.The ground diameter,crown diameter and secondary branch number with floret number showed a significantly positive correlation at the 50cm×50cm spacing.The influence order of morphological traits on floret number was secondary branches number>crown diameter.The secondary branches number played a primary role to two kind of density.We found that balsam is bearing on different adapted methods to obtain maximum floret number and maximum seed number in order to get more chance to reproduce under different cultivation spacing,by increasing more primary branches under 30cm×30cm spacing,and by expanding crown diameter under 50cm×50cm spacing.Compared with the former, plants stalk stouter,and resistance against downy mildew is stronger.So that it should be suitable for low-density cultivation.