Mine started last spring as a rooted cutting about this size:
I planted it in a 20 gallon nursery pot and put it in full sun with plenty of water and Miracle Grow on a regular basis.
It reached about 6 foot by August.
I cut it back hard... I would say about 60% removed.
I cut the branches into smaller pieces and planted them for rooting.
The mother plant immediately started re-growing... very fast growth with lots of fruit set as well.
These trees are amazing!
Kevin Jones