They have a growth rate of up to feet per year.
Jul 27, Pruning a river birch tree (botanically named Betula nigra) while it is still young is essential to keeping it in shape for the rest of its life.
Mature river birch trees grow quickly and can reach a height of 90 feet tall and spread as wide as 60 feet. They have a growth rate of up to feet per bushleaning.barted Reading Time: 5 mins. Apr 20, When trimming a river birch tree (Betula nigra), timing is everything. Native to the eastern United States and considered hardy in U.S.
Department of Agriculture plant zones 4. Apr 16, How to Prune a Birch Tree. There are several steps in pruning a birch tree. Take care of the easy stuff first by removing side shoots and suckers as necessary. Next, decide which branches to remove.
Be as conservative as possible. Removing more than twenty-five percent of the canopy of a tree at one time weakens it and may be fatal. Never top a tree.