Can you Clone a plant that has already gone into flower?

Ok. Going to give this experiment a try. They are pretty far along, but they either go in compost or try and clone them. Dipped the cut ends in some sort of clone gel stuff and stuck them in root riot cubes. Back in flower tent. If they take root, i plan to transplant them to soil and stick them outside to try and reveg.
Im not expecting much, but this doesn’t cost me anything except a couple root riot plugs.