I kept mine in a container for a couple of years, until it grew too big, and then I transplanted it out to the garden. I used to bring it indoors for the winter and keep it near a sunny window. I have several rooted cuttings that I'm doing the same thing with now. But eventually, they will be too big. The original one reached about 7 feet last year. I'm hoping it comes back - my neighbor has some and they do come back every year.

Some cultivars are better suited for containers because they stay small. Mostly the variegated ones (Snowbank and Peaches 'n Cream). All of them will grow in a container. It does sorta limit their size but has no effect on blooming. They do require a lot of watering during hot weather.

Use as big of a pot as you can find (and pick up) and plant in a fluffy potting mix with lots of fiber-y stuff blended in. I use pine bark fines (sold as Soil Conditioner), sandy soil from my yard, bagged compost, bagged peat based soil-less mix. I go heavy on the pine bark so that the media holds a lot of air. I mix in Osmocote slow release and I feed on a regular schedule. When brugs are actively growing you cannot over feed them. I have some in the ground and some in pots. I use Osmocote pellets in the media, Miracle Grow liquid once a week, and I pound in a tree spike once a year - thats a lot of food. When I have grown them for the fair, where I need them in full bloom in Oct, I do all the above AND I feed them dilute Miracle grow three times a week all summer long!!!

When grown in a pot brugs will get a nice umbrella shape to them that is most often missing when grown in the ground.

Daniel Stowe Bot. Garden keeps ENORMOUS brugs in pots by their rear entry. They do just fine but the pot needs to be big enough. Put the pot on rollers too so you can move it indoors for winter.
And..don't plan on taking any vacations unless you have brug sitter who will water and feed it.
Potted brugs are like having another child or pet.

I was just getting ready to post a question about feeding garden Brugs! John -- Thanks for the info.