15+ Why Are My Boxwoods Turning Brown In Winter. Boxwoods are usually very hardy in our hardiness zone but it was not an average winter, said plant clinic manager julie janoski. I have six boxwood shrubs that are turning yellow and look dead.
Prior to leaves falling off of trees, they typically change from green to yellow, red.
Now each is showing small areas that are green, but most of each plant is yellow and looks dead. Find out the answer in this article. Early in the spring i pruned off the winter kill leaves, and at that point the shrubs looked pretty good. Providing protection from the sun and wind and every autumn, the trees shed their leaves in preparation for the winter months.