What is required to winterize a holly bush in Minnesota, Zone 4?
Wintering Holly Bush in Minnesota
Certified GKH Gardening Expert
Generally these are hardy plants, requiring little, if any, winter care. However, in extreme situations, the shrubs can be wrapped. Here is an article on growing holly shrubs that you may find helpful: https://www.gardeningknowhow.com/ornamental/shrubs/holly/growing-holly-bushes.htm