I bought this plant as a seedling in a 4x4x10" starter pot in about 2010. I transplanted it to a 5 gallon pot in 2011 and then planted it in 2014. It bloomed a few months later. I don't recommend this course of action to others - it is simply what happened due other life events.
This plant is actually a shrub, and I don't recommend trying to train them as trees.