Winter weather can be a do or die situation for some plant and shrub materials. It maybe a good thing to cover your Crepe myrtles with burlap. Also protect your boxwoods laurels from winter burn. Covering them with burlap loosely is a way to protect your investment. Those tall Arborvitae will get damaged from heavy snow. So when your out clearing your driveway or walls, remember to knock off the heavy snow from them. Also be careful when using salt on or near shrubs.