I am continually amazed when trees which normally grow 50 feet or taller are planted under power lines or other places where there is not room for them to grow to full height. Whenever a new tree or shrub is planted the label or some other source such as google should be consulted to find out the ultimate height. However, nursery labels are tricky. The full height used on most nursery labels is the size it will reach after 10 years growth. Many plants do not reach their full height after 10 years, especially in the Pacific Northwest. In fact, if you add 20 to 25% to the 10 year height, you will be a lot closer to the ultimate height. So take this into consideration when you are selecting trees and shrubs for your landscape.