On one hand,the text made a thorough study on the effects of different sources of cuttings,different cutting ways,different treats for rooting,different cutting media and illumination time condition on Belgian azaleas' cutting propagation. On the other hand,the text preliminarily researched the responses of Belgian azaleas to the growth retardants CCC,B9 and PP333 . The effects of the three growth retardants on delaying branches' growth and promoting flank branches' development were compared. Th...