Posted: 23/11/2013 at 14:26
You could break the pot and remove the pieces then create a little raised bed (to the same height as the top of the soil in the pot) around the tree. The problem is that the tree roots have grown through the holes in the bottom of the pot and blocked them, so the pot no longer has any drainage. As the roots grow more, they will eventually strangle themselves at the point they pass through the holes in the pot. Leaving it like that will likely kill the tree. I strongly recommend sacrificing the pot and then either building the raised bed around it, or digging the whole thing out and planting it in the garden at the proper level.