It's somewhat odd that existing flower buds did not open. It may have had nothing to do with moving it. Were the unopening buds in one particular area or more or less evenly distributed throughout? If the first, they may have been killed over the winter, although this would be highly unusual for PJM. At this point it really doesn't matter. You might as well remove the unopened buds. New buds form on the current year's growth. The old ones will just hang on looking brown and ugly until they drop off. Keep watered, but a good soaking once a week or even less is better than two light sprinklings. The Hollytone was probably unnecessary but should not do any harm. Be prepared to see some wilting of the new foliage until it's able to harden. Such wilting is normal in full sun and does mean water is lacking at the roots.

My guess is that your buds got burnt out from the winter. That has been a very common occurrence among rhodies in zone 6 and colder. I know that our one Nova Zembla lost most of its buds due to the winter and the same with my Sapporo. You definitely want to keep this baby watered though. I'd let the hose trickle on it once a week for 20-30 minutes. Longer if it is a larger shrub.

We have several mature Rhodos that were hit hard by the Polar Vortex. Most of the buds are brown and hard. However many leaves are also brown and curled. Should I trim the branches after the few buds finish blooming?

artmotif: I've got several rhododendrons looking like this, too. Plus a fairly sizable fastuosum flore pleno with no leaves and flower buds which are about to open. Be patient. See where new leaf buds begin to break and trim back to that point. The brown, curled leaves will drop off on their own but can be removed by hand.