Web Master:
Yes, Syzygium can be grown successfully in pots, they may not grow as tall as when planted in the soil. You want to start with a pot that is double the size of the current pot, as the plant grows tall you can increase the size again.
Use a quality potting mix that allows for good drainage and aeration, to avoid over feeding plant use a sustained release fertiliser.
Syzygium plants grow fast and take about 4 years to reach full height