I-Trinexapac-ethyl ingeye-cyclohexanedione plant growth regulator, i-gibberellins biosynthesis inhibitor, elawula ukukhula okunamandla kwezitshalo ngokunciphisa okuqukethwe kwe-gibberellins. I-Trinexapac-ethyl ingamuncwa ngokushesha futhi iqhutshwe yiziqu zezitshalo namaqabunga, futhi idlala indima ephikisana nokulala ngokunciphisa ukuphakama kwesitshalo, ukwandisa amandla esiqu, ukukhuthaza ukwanda kwezimpande zesibili, nokuthuthukisa uhlelo lwezimpande oluthuthuke kahle.

I-Paclobutrazol iyi-ejenti yezolimo engenza buthaka inzuzo ephezulu yokukhula kwezitshalo. Ingamuncwa izimpande zezitshalo namaqabunga, ilawule ukusatshalaliswa kwezakhi zezitshalo, yehlise izinga lokukhula, ivimbele ukukhula okuphezulu kanye nokwelulwa kwesiqu, futhi ifinyeze ibanga le-internode. Ngasikhathi sinye, ithuthukisa ukuhlukaniswa kwezimbali, ikhulisa inani lezimbali, ikhuphule izinga lokumiswa kwezithelo, isheshise ukuhlukaniswa kwamaseli.

Ukuxutshwa kwezilawuli zokukhula kwezitshalo kanye nama-fungicides kuncike endleleni yokusebenza kwama-ejenti, ukuqhutshwa kwesistimu, ukuhambisana kwezinto zokulawula, nokuthi ngabe ukuphikisa kuzokwenzeka ngemva kokuxuba. Kwezinye izimo, njengokufeza inhloso yokuvimbela izifo noma ukuthuthukisa ukumelana nezifo zezitshalo, ukukhuthaza ukukhula kwezitshalo noma ukutshala izithombo ezinamandla.

I-Naphthalene acetic acid (NAA) iyisilawuli sezitshalo ze-auxin. Ingena emzimbeni wesitshalo ngamahlamvu, i-epidermis enethenda kanye nembewu, futhi ithuthelwa ezingxenyeni ngokukhula okunamandla (amaphuzu okukhula, izitho ezincane, izimbali noma izithelo) ngokugeleza kwezakhi, okugqugquzela kakhulu ukuthuthukiswa kwethiphu yesistimu yezimpande (i-rooting powder) , ukukhuthaza ukuqhakaza, ukuvimbela izimbali nezithelo eziwayo, ukwakha izithelo ezingenambewu, ukukhuthaza ukuvuthwa ngaphambi kwesikhathi, ukwandisa ukukhiqizwa, njll. Kungathuthukisa futhi ikhono lesitshalo lokumelana nesomiso, amakhaza, izifo, usawoti kanye ne-alkali, nomoya owomile oshisayo.