Fake plants and leaves are great for a natural look to add to your snake's enclosure. I use them for my ball python's cage, and the upkeep is so much easier than real plants (which I probably wouldn't use anyway).
I actually cut a few leaves off a fake plant vine and hot-glued them together in little bundles then onto the snake's wall background, not the platic backgrounds you cut and tape the back of the cage, it's something else
. I also hung some from the lid of his cage and stuck little leaf bundles in his substrate to make it look like it grew out of the soil. It looks pretty natural.
Hope that helped