Made it for a trimestral (something like that) contest on blenderPT forum to test the new features of Blender v2.71.
Used Blender 2.71 for the modeling, sculpting, tress (Sapling_Tree addon), fire and smoke simulation and fluid simulation. Rendered in Cycles.
The ground was textured using Bitmap2Material.
Plant textures from deviantart user Nobiax : http://nobiax.deviantart.com/art/Free-3D-plants-textures-04-264756335