Ukuxutywa kwabalawuli bokukhula kwezityalo kunye ne-fungicides kuxhomekeke kwindlela yokwenza i-agent, i-systemic conductivity, ukuhambelana kwezinto zokulawula, kunye nokuba ukuchasana kuya kwenzeka emva kokuxuba. Kwezinye iimeko, ezifana nokufezekisa injongo yokuthintela izifo okanye ukomeleza ukuxhathisa kwezifo zezityalo, ukukhuthaza ukukhula kwezityalo okanye ukuhlakulela izithole ezomeleleyo.

I-Naphthalene acetic acid (NAA) yi-auxin plant regulator. Ingena emzimbeni wesityalo ngamagqabi, i-epidermis yethenda kunye nembewu, kwaye ithuthelwa kwiindawo ezinokukhula okunamandla (amanqaku okukhula, amalungu amancinci, iintyatyambo okanye iziqhamo) kunye nokuhamba kwezondlo, ukukhuthaza kakhulu ukuphuhliswa kweengcambu zenkqubo yeengcambu (i-powder powder) , ukukhupha iintyatyambo, ukuthintela iintyatyambo kunye neziqhamo eziwayo, ukwenza iziqhamo ezingenambewu, ukukhuthaza ukukhula kwangaphambili, ukwandisa imveliso, njl.

I-Indole-3-butyric acid (IBA) sisilawuli sokukhula kwesityalo esinokukhuthaza ukukhula kwezityalo kunye nophuhliso, ukwenza izityalo zityebile kwaye zomelele, kwaye ziphucule ukukhuseleka kwezityalo kunye nokuxhathisa uxinzelelo.

I-Brassinolide (i-BRs) isisilawuli esisebenzayo sokukhula kwesityalo esisetyenziselwa ukunciphisa umonakalo wokubulala izitshabalalisi. I-Brassinolide (BRs) inokunceda ngokufanelekileyo izityalo ukuba ziphinde zikhule ngokuqhelekileyo, ziphucule ngokukhawuleza umgangatho weemveliso zezolimo kunye nokwandisa isivuno sezityalo, ngakumbi ekunciphiseni umonakalo we-herbicide. Inokukhawulezisa ukudityaniswa kwee-amino acids emzimbeni, yenze ii-amino acids ezilahlekileyo ngenxa yomonakalo wezitshabalalisi, kwaye ihlangabezane neemfuno zokukhula kwesityalo, ngaloo ndlela ithomalalisa umonakalo wokubulala izitshabalalisi.