Gibberellic acid, also known as gibberellin, is a complex organic molecule that acts as plant growth hormone. They are called diterpenic acids having the formula C 19 H 22 O 6. They regulate cell division, cell elongation, sexual expression, seed germination, seed dormancy and flowering. Among microorganisms such as bacteria and fungi, gibberellin 3 is the main product of gibberellin as a secondary metabolite (Brookner and Blecschmidt, 1991; Karakoc and Aksoz, 2006). To date, 136 gibberellins have been isolated from various plants and gibberellic acid 3 shows the greatest biological activity (Rodrigues et al., 2011). The use of GA 3 has been approved by the Food and Drug Administration (FDA) for its huge application and non-toxicity and its environmental and human safety has been confirmed by the Material Safety Data Sheet (MSDS) (Rodrigues et al. 2011)
Since the growth and development of plants can be controlled by the use of plant regulators, the use of these substances in flower cultivation will increase. In this regard, gibberellic acid (GA 3) has been shown to induce flowering in Araceae species (HENY & HAMILTON, 1992; BOSCHI et al., 1998; ZHENG & CHAO, 2004; CHANDARAPA et al. 2006; HATIBARUA et al., 2006). Therefore, the purpose of this study was to evaluate the influence of GA 3 on the growth of anthurium and yield of flowers. Apply