I have considerable experience with carrizo; it is susceptible to Phytophera... not a problem in containers; it is a full size rootstock, not dwarfing like flying dragon. For a container orange I would opt for FD, or Cuban Shaddock, which Four Winds Growers uses. There are others; but for a container I don't think you want a full size orange tree...of course that could depend on the size of your "container".

I have a Moro blood orange on Carrizo, it was in a 5 gal container and, since I don't have a spot in the ground for it yet, I just moved it to a 15 gal container. The trunk is 1 1/2" just above the base.

Johnmerr, do you have any idea how this tree would do if I left it in the 15 gal container for a year or more? It's healthy looking, has about 5 fruit on it. The potting soil in the original container was pretty heavy, sand and something else. I washed some of that off, and am using a Supersoil and pumice mix in the 15 gal container.

jb...
I am not a container genius... lots of people here are.

I am sure they will answer here to help you.

John