Just from my own exprience and trying different methods, I have found that taking a lesson from transplanting trees works the best, provided you have a few days to complete the task. Your roots are going to be all over the place as Cali said, that is why first I take my shovel and cut a ring in the soil as wide as the canopy, go as deep as you plan on taking up the plant. Let the plant stand like this for a day or 3, your plant is going to go into shock at least a little bit. I use a foliar spray of super thrive, I have seen both good and bad on this but I have used it over forty years and I swear by it. Once you see that your plant has perked back up it is time to go ahead and pull it out of the ground and put into the biggest pot you can find to hold your root ball and still have growing room for the new roots. Spray the plant with super thrive again to help it over any shock ( 1 drop per gallon of water). Hope this will give you something to think about or try along with any other method and see which will work best for you. Happy growing