Even so, it is said that the leaves of Korean boxwoods turn bronzy in winter (in cold regions). I cannot vouch for this yet, because the leaves on mine stayed green during their first New England winter. I had purchased them in late fall and temporarily "planted" them in the ground, pots and all, to over-winter them. However, that winter (2005-2006) was an unusually warm one. In addition, I sheltered my shrubs, and I watered them whenever there was a thaw.