Mazzard in container
I recently bought a Dave Wilson montmorency cherry tree on mazzard rootstock and stuck it in a half barrel. I thought that the tree would be suitable for a container when I got it, but I'm pretty sure I made a mistake since it says it'll get 20-25 feet tall. It's 6 feet tall now and came in a 5 gallon container.
Should I sell it and get a montmorency cherry tree on gisela 5 rootstock instead? Is there any reason to think that my tree would do well in a half barrel?