Thanks for your responses. This tree was bought as a seedling at Muranaka Bonsai nursery and planted in the ground about five years ago. Most of my pomegranites I have found at an old landscape nursery (which means they were about $10 apiece). In most cases, these were trees that had been neglected. I cut off the main trunk and used well established suckers as the new trunk. I'll post a few photos in the coming weeks, they're just starting to leaf out.
As you said Judy, they are tough trees, the only suggestions I have is to wire them early because the branches stiffen up quickly and I continually pinch them back during the spring and summer.
One more thought. The most challenging thing I find with the pomegranite is to keep the upper branches think. The branches thicken up quickly so I'm careful not to allow too many secondary branches to grown on a primary branch and thicken it up too quickly. Also, I'm alway redesigning the tree so I can cut off the upper branches that grow unnaturally thick.