A piece of my tree, i will be using it in my hedge. I put in a plastic bottle, without bottom inside of a pot, the bottle was for me to inspect root growth. I put the whole thing in a garbage bag inside the cabinet over the heat vent - a week later, I inspect to see and could not believe my eyes.... the roots were all over, so I removed the bottle (breaking many roots) and potted without the bottle.... I guess it made it. this trunk is about 2.5" diameter .