Gibberellic acid (GA3) bụ ihe na-achịkwa uto osisi.A na-ejikarị eme ihe iji kwalite uto na mmepe nke ihe ọkụkụ, tozuru okè n'oge, melite mmepụta, na-agbaji dormancy nke osisi, tubers, bulbs na akụkụ ndị ọzọ, na-akwalite germination, tillering, bolting, ma melite ọnụego mkpụrụ.Ọ dị irè karịsịa n'idozi nsogbu nke okooko osisi na-adịghị ahụkebe na mmepụta mkpụrụ osikapa ngwakọ.A na-ejikarị ya na owu, mkpụrụ vaịn, poteto, mkpụrụ osisi na akwụkwọ nri.
