The best time to prune birch trees is in the late spring or early summer after their leaves are fully developed. Cutting birch trees in the late winter or early spring causes the sap to bleed, which exposes the tree to winter damage.
About this Author
Karen Carter has spent the last three years working as a technology specialist in the public school system. This position included hardware/software installation, customer support, and writing training manuals. She also spent four years as a newspaper editor/reporter at the Willapa Harbor Herald.