Pruning by Dan Ziomek
Spring is in the air and the sap is beginning to flow. That means it's time to sharpen your pruners and shape up your yard. Spring is a great time to prune most trees and shrubs and here's why!
Healing occurs faster when sap is flowing upward, disease and insect pressure is at its lowest and the lack of foliage makes identifying problems much easier.
That being said, a few plants should not be spring pruned. Maples, Birches, Dogwoods and Redbuds should all be avoided due to excessive bleeding from pruning cuts. Additionally, plants that bloom in early spring (Forsythia, Lilacs, etc.) should not be pruned until after blooming.
The best advice I was given is : When pruning, remove any dead, diseased or crossing branches and then step back from the plant and assess its shape. Quite often you will be done with pruning after removing these problems. If not, continue to carefully remove branches until the desired shape is achieved.