As I write, I am comforted by the snow that has accumulated on the boughs of my Nordmann fir and Serbian spruce. It is beautiful, yes, but more important, the snow serves as an insulator against desiccating winds and frigid temperatures. We must not forget that evergreens, particularly broadleaf evergreens like rhododendrons and American hollies, lose a great deal of moisture through their leaves in the winter.
Winter desiccation is not unusual but the effects are magnified coming out of a season of drought.