I am currently trying to transplant my 15 yr old hydrangea. It is planted too close to its partner and so I want to move it 3 ft further down. We have dug all around the base and down at least 2.5'. There is no "root ball" that all the transplant experts speak of but a very large thick "tap root" that is 4-5 inches in diameter and will not budge. Two of us had shovels under as deep as they would go trying to rock it out and my shovel broke! Any suggestions besides using my truck to pull it out?