I would think...
that possibly, since it is making a likeness of Allah's (swt) creation, it could be haram? I took away all my rooster stuff out of the kitchen, and some of my sculptures, and anything that was a picture that is a likeness of a person. I got rid of my lamps that had an elephant holding the night light, etc.
so is making a fake plant, the same? no one seems to know.