Tips for preparing and protecting trees for winter

We know the importance of winterizing our homes and vehicles as the cold weather approaches, but in order to get through the harsh winter, trees need some extra care, too. The USDA Plant Hardiness Zone map is based on the average annual minimum winter temperature. For North Dakota, the northern tier is Zone 3 (-35 to -30 F) while the southern two-thirds of the state is Zone 4 (-30 to -25 F)....