Ama-agent amane okulawula ukukhula, i-Paclobutrazol, i-Uniconazole, i-Chlormequat Chloride, ne-Mepiquat chloride, zonke zilawula ukukhula kwezitshalo ngesikhathi esifushane ngokuvimbela ukuhlanganiswa kwe-Gibberellic acid ezitshalweni. I

I-Paclobutrazole (Paclo) isetshenziswa ezitshalweni ezihlukahlukene ezifana nerayisi, ukolweni, imifino, nezihlahla zezithelo. I-Paclobutrazole (i-Paclo) ivimbela ukukhula kwezitshalo ezibanzi. Ingavimbela ukuhlanganiswa kwama-gibberellins angapheli ezitshalweni futhi inciphise ukuhlukana nokwelulwa kwamaseli ezitshalo.

I-Compound sodium nitrophenolate (i-Atonik) iyisilawuli sokukhula kwezitshalo esisebenza kahle kakhulu. Inezici zokusebenza kahle kakhulu, ukungabi nabuthi, akukho zinsalela, kanye nobubanzi bokusebenza. Ibizwa ngokuthi "Isilawuli Sokukhula Kwezitshalo Esinconyiwe Sobunjiniyela Bokudla Okuhlaza" yi-International Food and Agriculture Organization. ayikho imiphumela emibi kubantu nasezilwaneni.

I-Thidiazuron (TDZ) iwumsoco ikakhulukazi ohlanganisa ingxube ye-potassium dihydrogen phosphate ne-thiadiazuron. Inemiphumela eminingi ekukhuleni nasekuthuthukisweni kwezihlahla zezithelo: ukwandisa isivuno, ukuthuthukisa ikhwalithi, ukuthuthukisa ukumelana nezifo, njll. I-Thidiazuron (TDZ) ingakhuthaza i-photosynthesis, ithuthukise ukusetshenziswa kwezakhi zezitshalo, ikhulise inani lezimbali zezimbali kanye nekhwalithi yezithelo.