Microtree (3 of 7)
A different proposition, that is perhaps more of a bush than a tree, and arguably also minifig scale rather than micro-scale. I love that the regular green plant vine piece have popped up in PaB walls! I've done something similar with dark green vines before, but with regular green it was harder to hide the black center of the plant. Though patches of black are visible I feel this still works very well, with no real problems, except perhaps that the bottom layer needs to be covered up a bit.
The real master of these types of trees is, of course, Ecclesiastes. His trees are awesome, and were one of the first lego trees I came across when just coming into the afol scene. He's even got instructions for his version, which can also be built much taller than mine. Definitely worth checking out if you haven't seen them already!