Kavod HaRav: How to dispose of the Lulav/abra minim species? Am I allowed to bend or snap the species to fit in into a plastic bag? I don’t have bags that are big enough to put them into without bending / snap/ fold /etc?
Shaolom U'vracha, Yes, this is permitted. One is not allowed to degrade them, like throwing them straight into the garbage bin or stepping on them. However, what you mentioned is not considered "bizui", or degrading. (see Mishna B'rurah 21:6 and 624:28).