I have 3 beautiful well established (10+ year) Camellias. They are about 5'(1.5 meters)tall and grow 3' apart next to each other.

We are expanding our house, so need to dig them up and put them in pots for 4 months between September and December. The temperature will be between 45F - 90F (7C - 30C) during that time. At the end of the expansion, we want to put them back to the ground (close to their currrent site).

What should I do to keep them live and happy during these two transplate? How big the pots need to be relative to their rootball?

Thanks!