I-Gibberellic acid (GA3) ngumlawuli wokukhula kwezityalo.Ikakhulu isetyenziselwa ukukhuthaza ukukhula nophuhliso lwezityalo, zivuthwe kwangethuba, ziphucule imveliso, ziqhawule iimbewu, izigaqa, iiglowubhu kunye namanye amalungu omzimba, zikhuthaza ukuntshula, ukuhlakula, ukubolisa, kunye nokuphucula izinga lokuthwala iziqhamo.Isebenza ngokukodwa ekusombululeni ingxaki yokudubula kweentyatyambo ezinqabileyo kwimveliso yembewu yerayisi engumxube.Isetyenziswa kakhulu kwikotoni, iidiliya, iitapile, iziqhamo kunye nemifuno.