Gibberellic acid (GA3) yog cov tshuaj tiv thaiv kev loj hlob ntawm cov nroj tsuag.Nws yog tsuas yog siv los txhawb kev loj hlob thiab kev loj hlob ntawm cov qoob loo, paub tab ntxov, txhim kho kev tsim khoom, tawg lub dormancy ntawm noob, tubers, qij thiab lwm yam kabmob, txhawb germination, tillering, bolting, thiab txhim kho cov txiv hmab txiv ntoo tus nqi.Nws yog tshwj xeeb tshaj yog zoo nyob rau hauv kev daws teeb meem ntawm tsawg flowering nyob rau hauv hybrid nplej noob zus tau tej cov.Nws yog dav siv hauv paj rwb, txiv hmab txiv ntoo, qos yaj ywm, txiv hmab txiv ntoo thiab zaub.