The Advantages of Pruning Your Trees in Winter:In Colorado a major obstacle for trees is harsh winter storms that can bring dry Chinook winds with heavy, wet snows or “hurricane” force winds that damage tree structure. Besides getting a good look at the structure and form of a tree in winter there are other benefits of winter pruning. When other plants in your yard are dormant it is an opportune time to prune your large trees and minimize impacts to the rest of your landscape. Prune fruit trees and susceptible Hawthorns in winter to avoid disease activity,and trees such as American Elms or Pines when bark beetles and other insects are dormant.