Our backyard is bordered by the neighbor's arborvitae that has reached 30 feet in height and is 45 years old. This height has created unwanted shade invasion of our and a neighbor's backyards which should enjoy a full southernly exposure to the sun. The arborvitae owner expresses concern that reducing the height will result in death of trees. An overall reduction of 5-6 feet would greatly improve sunlight exposure for us. Is the concern that such a pruning will be a death sentence for the trees a valid one?
Clackamas County Oregon