| When is the correct time to trim Birch trees. In North Carolina |
| Some trees, such as birch, dogwood, elm, honey locust, maple, and walnut exude excessive sap from the wound when pruned in late winter or early spring. Sap flow does not hurt the tree but it is unattractive. To minimize sap flow, these trees are best pruned in late spring, summer, or fall. |
