Stem diameter and height of chrysanthemum cv Yoko ono as affected by gibberellic acid

The effect of gibberellic acid has been shown mainly to promote cell division and elongation. This study was aimed to evaluate the development of height and diameter of the stems of chrysanthemum cultivar Yoko ono by the applications of gibberellic acid (GA3) in the field. The treatments were composed of four doses (0, 40, 80 and 120 mg L-1) at 15 and 30 days after transplanting. From the findings, It can be concluded that GA3 significantly affected the diameter of stem at higher doses, and was unable to affect the height of stem.Key words: Dendranthema grandiflora, flowers, plant regulator, concentration