Ukunisela kungomunye wemisebenzi eyinhloko yokuphatha izitshalo ze-bonsai. Ukunisela kubonakala kulula, kodwa akulula ukukunisela ngendlela efanele. Ukunisela kufanele kwenziwe ngokuya ngezinhlobo zezitshalo, izinguquko zonyaka, isikhathi sokukhula, isikhathi sokuqhakaza, isikhathi sokulala kanye nezimo zezulu zesitshalo. Ukwazi isikhathi sokunisela kanye nenani kubaluleke kakhulu ekukhuleni kwezitshalo. Ukufa kwezinye izitshalo ze-bonsai kuhlobene ngqo nokunisela okungafanele.

Ngaphezu kokuhlinzeka ngamanzi nezakhi ezitshalweni ezifakwe emanzini, inhlabathi yebhodwe ibuye igcine ukuphefumula okuvamile komoya kwezitshalo. Lapho inhlabathi yebhodwe inomswakama owanele, izinhlayiya zenhlabathi ziyakhula, zikhiphe umoya ezikhaleni phakathi kwezinhlayiya, okubangela ukuntuleka komoya emhlabathini webhodwe; lapho inhlabathi yebhodwe isomile noma isomile, izinhlayiya zenhlabathi ziyancipha, umthamo uba mncane, futhi izikhala phakathi kwezinhlayiya zivela futhi. Izikhala zigcwele umoya.

Njengoba inhlabathi ishintsha phakathi komile nokuba manzi, umoya osenhlabathini yebhodwe nawo uzungeza njalo, uvumela izimpande zesitshalo ukuba ziphefumule ngendlela evamile. Ngemuva kokunisela ngakunye, izimpande zesitshalo zizokwazi ukubekezelela ukuntuleka komoya-mpilo enhlabathini yebhodwe phakathi nesikhathi esifushane. Kodwa-ke, uma inhlabathi yebhodwe imanzi kakhulu isikhathi eside, okuholela ekuntuleni isikhathi eside komoya-mpilo, kuzodala ukuguguleka kwezimpande nezinye izifo; Uma inhlabathi yomile isikhathi eside, nakuba kune-oxygen eyanele emhlabathini webhodwe, izitshalo azikwazi ukumunca amanzi isikhathi eside, okulimaza nokukhula kwezitshalo futhi kungase kubangele ngisho nokufa. Ngakho-ke, lapho unisela izitshalo ze-bonsai, isimiso esithi "ungawaphuzisi uma sesomile, sinisele kahle" kufanele silandelwe.

Ukunisela okunganele kanye nokuphelelwa amandla kwamanzi kwezitshalo kuzobangela ukuthi amahlumela abune futhi awele, futhi amaqabunga abune, aphuzi, futhi awe. Endabeni yezinhlobo ze-coniferous, izinaliti zizothamba futhi zilahlekelwe umuzwa wazo oqinile futhi ohlabayo. Uma ukushoda kwamanzi kubi kakhulu, i-cortex yamagatsha ancipha njengama-goosebumps. Uma uhlangabezana nalesi simo ehlobo, kufanele uhambise isitshalo ngokushesha endaweni enomthunzi. Ngemva kokwehla kwezinga lokushisa, fafaza amanzi emaqabunga kuqala, bese uthela amanzi amancane ebhodweni, bese uthela amanzi kahle ngemva kwehora elilodwa.

Ezitshalweni eziphelelwe amanzi kakhulu, qiniseka ukuthi awuniseli ngokwanele ngesikhathi esisodwa, ngoba lapho isitshalo siphelelwe amanzi kakhulu, i-root cortex iyancipha futhi iseduze ne-xylem. Uma inani elikhulu lamanzi linikezwa ngokuzumayo, uhlelo lwempande luzokhula ngenxa yokumuncwa kwamanzi ngokushesha, okubangela ukuba i-cortex iqhume, okuholela ekufeni kwesitshalo, ngakho-ke kudingeka kube nenqubo yokujwayela kancane kancane. Ngemuva kokuthi izitshalo ezishoda kakhulu ngamanzi zithole ukwelashwa okungenhla, kungcono ukuzigcina ngaphansi kweshede lomthunzi izinsuku ezimbalwa, bese uzihlakulela elangeni ngemva kokuba seziqinile. Nokho, ungawafaki amanzi ngokweqile. Ngaphezu kokubangela izitshalo ukuba zikhule ngokukhuphuka, okuthinta ukwakheka kwesihlahla kanye nenani lokuhlobisa, ukuchelela ngokweqile kungabangela kalula ukubola kwezimpande nokufa. Izimbiza zebhonsai ezincane zidinga inhlabathi encane, ngakho-ke kubaluleke kakhulu ukunisela ngesikhathi esifanele nangenani elifanele.