Ii-agent ezine zokulawula ukukhula, i-Paclobutrazol, i-Uniconazole, i-Chlormequat Chloride, kunye ne-Mepiquat chloride, zonke zilawula ukukhula kwezityalo ngexesha elifutshane ngokuthintela ukuhlanganiswa kwe-Gibberellic acid kwizityalo. I

I-Paclobutrazole (i-Paclo) isetyenziswa kwizityalo ezahlukeneyo ezifana nerayisi, ingqolowa, imifuno kunye nemithi yeziqhamo. I-Paclobutrazole (i-Paclo) i-broad-spectrum yezityalo ezithintela ukukhula. Inokuthintela ukuhlanganiswa kwe-gibberellins engapheliyo kwizityalo kunye nokunciphisa ukwahlukana kunye nokwandiswa kweeseli zezityalo.

I-nitrophenolate ye-sodium edibeneyo (i-Atonik) yinkqubo ephezulu yokulawula ukukhula kwezityalo.Ineempawu zokusebenza kakuhle, ukungabi natyhefu, akukho ntsalela, kunye noluhlu olubanzi lwesicelo.Kubizwa ngokuba "yiNjineli yoKutya okuHlaza okuNcetywayo yokuKhula kweZityalo" nguMbutho weHlabathi woKutya noLimo. akukho miphumo emibi ebantwini nakwizilwanyana.

I-Thidiazuron (TDZ) sisondlo ikakhulu siqulunqa umxube we-potassium dihydrogen phosphate kunye ne-thiadiazuron. Ineempembelelo ezininzi ekukhuleni nasekuphuhlisweni kwemithi yeziqhamo: ukwandisa isivuno, ukuphucula umgangatho, ukuphucula ukumelana nezifo, njl njl. I-Thidiazuron (TDZ) inokukhuthaza i-photosynthesis, iphucule ukusetyenziswa kwezondlo zezityalo, ukwandisa inani leentyatyambo kunye nomgangatho weziqhamo.