Do you have any idea of what is eating the plant's roots? Are there any signs of anything? Some things that eat roots can be transferred to whatever you move your plants into. Things like mole crickets and white grubs could remain in a rootball when a plant is moved unless someone does a bare root transplant and I have a feeling you would not care to attempt that. When you move the plants try to find out what was munching down on the roots because you may transfer the problem along with your plants and lose them anyway by just assuming moving them was all you needed to do.