plant a potted mandarin tree on my back patio

Looked at some trees at home depot. The guy there said they don’t grow well in pots, but their were instructions on the tag on how to grow them in pots. We figured we’d wait awhile and maybe browse around and do more research first. 5 years ago

They have these big barrels on sale at raley’s not surehow many gallons they are, but was thinking it would be nice to have a little mandarin tree. I did some research, but need to go to a nursery to see if it’s possible for me to keep it alive 5 years ago