Agree w / stony

your best bet is to carefully dig it up and re-plant it. Only I would re-plant it directly in the ground if you have good spot. Dig a big 2X2 hole 10 inches deep and mix it up with lots of good plant soil. Then re-plant it. If you can not do that, then re-plant it in a large 7 gallon pot.

Good luck with it.