Hi, last fall I bought and planted 15 white peonies. I bought these peonies from a person selling them locally and I planted them in my south facing backyard. They are planting on clay/sandy mix soil and did quite well this year (no blooms). I didn't like the layout of how and where I planted them and I am wanting to remove and sell them to plant a row of Boxwoods. I plan on potting them up and selling them in the spring but I have a few questions before I do so. Here they are...

1. Is it possible to pot them?
2. What type of soil should I use? normal potting soil?
3. Would the best time to pot them be in the fall?

Thanks