Here's another from the same set of trees. No baby pictures on this one, but it's been in the ground for two years. Came to me as a bit more than a pencil thick volunteer seedling MIL had in a pot from her yard. Bit of a strange rock choice, since it is basically a flat platform, but I had it on hand at the time. Root development impressed me, and after getting a look at it out of the dirt, I guided the long fibrous roots you can see along the back over the ledge.
We'll see what it looks like in another couple years. The rock is broad enough that I think the trunk is going to need a fair amount of thickening up before it can keep up. The roots too for that matter -- my wife says it looks like a spider.