what i know that plant cell culture it's easy you need a specific media with phytohormone (auxin , cytokine ...) and other element for cell growth ( oligoelement and macromolecule , mineral salt , vitamins ....) , you control humidity photoperiodism , pH and some parametre , plant cell is characterized by totipotency ( regeneration to a plant individu ).
concerning bacteria you need specifique media for each species , and for animal cell it's not easy and it's not complicated .