Pruning deciduous trees such as maples, birches, black walnut, beech, hornbeam, willow, and yellowwood when the temperature is above freezing produces excess sap flow from the newly cut ends.

Walnut trees will near the end of their productive life after 40 years. If you see that less than 20 percent of a tree’s branches are dead, you can prune them back until you get to the green ...