My mistery plant was just identified by "Saltcedar" and at this moment, I have in a 10 inch pot. This plants seems to grow up to 4 feet. Do you think it will do good if I just keep it in a pot? I can move it to a bigger pot or do you think it will do OK if I leave it in the 10 inch container? I really don't have much space left in the yard as everything has been planted and I would really like to keep such a lovely plant. Thanks for the input.