Kinda of no such thing as overwatering for bonsai, given proper soil with very good drainage. Not sure what your issue is, but I know my bonsai pomegranates have always gone through some rough patches but always come back with a vengeance. Some good fertilizer probably would not hurt. Of course, consistent strong light and warmth are imperative for keeping these normally deciduous/semi-deciduous plants green.

They can, and will, get quite large with time. My uncle has an old tree on his property that is about 25 feet tall and about 25 feet wide or more at the canopy. They keep it pruned below and it had an umbrella-shape. However, if you water it less, it will stay a bit on the small side. Keep in mind that this tree was likely planted when the house was built in the 1930s. Pruning will help as well because they love to send out new shoots from ground level. Without proper removal of these vigorous shoots, the plant can become a messy thicket. Commercially grown pomegranates are usually kept about 8 feet tall and about 5 or 6 wide so I think that with proper pruning, your tree can stay within that size and fruit well for you.

Yup, this is the place to be for the true and simple solutions. Yes, it can get messy. If so, and its from the spatter guard area, you can either cover over the open area and catch bowl with plastic wrap or foil. There is usually clear plastic 'cone' that snaps onto the smaller open end of the conical strainers, and there you put the waste bowl, and you can also cover that area too with plastic wrap. This will help some. If its in the hopper (top) area, where you get spatter there, you break the poms into smaller pieces. One way to reduce the juice spatter while breakingtem apart is to put the peeled poms one at a time in a zipper bag and tear apart chunks through the plastic bag. Then open it, and pour the stuff into the hopper/funnel on top. Time to make some nice and unique pomegranate jelly, or even add some cranberry juice and and make it as a mix of the two. Very good and healthy. Wish I could grow those things here in Z6.

Probably environmental and related to being moved outdoors where the temps swing more than in a home environment. I bet it will get back on track soon. Do you see any webbing near where the leaves join the branches? That could be a sign of spider mites, they can deform leaves also. Pam