Hi Adam, as long as your pots are large enough and of an appropriate material, I would think you should be able to simply plant them in the pots without burying the bud unions. I think you'll find the plants nicer if you DON'T bury them so they don't go own root. As for the soil, you honestly don't need anything specifically for roses. A good general potting soil is sufficient. I base that on over thirty years of growing roses in containers. Good luck and have fun with them! Kim

Thanks Kim.
Another question for you, have you ever planted two roses together in the same pot? I have seen roses and other plants planted doubly in the ground, but would they be too congested in a pot?

You're welcome, Adam. That would probably depend upon the size of the pot. I've planted multiple minis together in a large pot for a fuller look. Generally, if you're going to plant multiples together, you're better off making it multiples of the same variety so the results are like a very large, dense, full plant of the one type. There aren't many varieties with sufficiently similar habit to make an attractive mass together in a container, and for larger types as you've listed, you're going to need a very large pot for there to be enough soil and top room.

Multiple multiflora root systems in a pot could easily result in watering issues where you may have to water up to twice daily in high heat and wind periods. Water stressed plants not only don't perform well, but are also more susceptible to diseases. I think you would be much better pleased by keeping them potted individually. I know the roses would be. Kim

One problem with multiflora in a hot climate is that they are more picky than most about salt level in the soil. They're easily burned. They also won't be as tolerant of alkaline soils, if you can't control the pH.

Hrm.....
I will just have to make sure I flush the pots with fresh water regularly I guess. And definately not plant them out inthe ground.