I used to have my bp in a natural vivarium. I grew Pothos (devil ivy), bamboo, some sort of fern type plant, and a bunch of those orchid plants that i bought at an expo. The orchids were the ones that just grew in the air so i attached them to branches all around the tank. It looked really good but the maintenance involved with it eventually became too much of a pain for me. I suggest mixing lives plants with fakes plants.
This book, along with all of Vesoloji's other books, really helped me. I find all of his books to be fairly informative and better than other ones out there.

http://www.amazon.com/Keeping-Snakes...tt_at_ep_dpt_3