Each growing point waits for the correct message to signal a new season of growth. Only then will it be apparent whether the tree has put aside and saved enough resources to respond to the new season of growth. Winter is a difficult time for trees. Trees must stand in the face of drying and cold winds. Food reserves must be carefully conserved for the coming needs of Spring.
Water continues to be lost from the tree.
Any creature needing a meal chews and nibbles on the resting buds and twigs. Trees stand alone against all circumstances that the winter season can generate. Little things can make your trees more effective and efficient at surviving a long winter. A few small investments now can pay-off in a large way, yielding a healthy and structurally sound tree. Remove or correct structural faults and deadwood that are clearly visible.