I am sorry for this delayed reply to your gardening question. The spring rush has brought a deluge of questions and we are working hard to catch up!
You can choose either way. That tree won't take a hard freeze so unless you have a way to protect it over winter I'd keep it in a container. As you move it to larger containers it will be able to grow larger that it can in a smaller container.
Thanks for the question. Best wishes for a wonderful gardening season. Please stop in again soon!
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