After creating the UV mapping I used some of my concept are and Photoshop to create the texture, I kept importing it into Maya in order to see how it all fit together, to make sure there weren't any major flaws. This took a long time, and there are still some areas I may go back and fix later.
I then experimented a little with the bump-map, adding textures and then smoothing out some areas etc, (making sure the leaves weren't textured like worn rock). I like the effect but may have to alter some of it, (some cracks still look painted on etc).