That's pretty cool, man! Good job. The textures and the structures of the leaves are very cool.

One technical note on how plants grow: The branches grow out two to a node on opposite sides of the stem, not four to a node, and the branch sets alternate direction by 90 degrees at each node. So instead of having four branches sprout off the main stem at each node, you need two at the first node going out of opposite sides at say 0 degress and 180 degrees. Then have two more at the next node up the stem going out at 90 degrees and 270 degrees. Then alternate up the stem that way. It's interesting how mathematical the growth of plants really is.