I have had my Callicarpa "American Beautyberry" for several years. This year, it is really drooping, so much so that I have put in some supports to keep it off the ground. I have always pruned it hard in the spring, as I have been practicing on all of these plants I encounter in customer's landscapes. We have had plenty of rain this year, so there is no lack of moisture. Maybe too much? I planted it in an east exposure, and it is in a mostly shaded spot(just morning sun) Not enough sun? I am tempted to reduce the amount of pruning I do on the old wood next spring. Wonder if that would help it become more of an upright plant? Also, it was a good plant last year, but did not set on very many of the colorful purple berries, which is mainly why I want this plant in my garden! Again, not enough sun? I saw them all over town last fall with those pretty berries. My plant seems like a dud. Any thoughts? I'm zone 5.
Judging by the fact that they do well in full Alabama sun, I'd say yes, more sun should help so much farther north. If you're having to prune for size, you may want to consider a spot where it has room to grow unmolested.