Maple trees should be pruned in mid-summer. Although many other types of trees are best pruned in winter, spring or fall, maples will leak their sap when pruned during the cold months. The sap will not harm the trees, but it can make the trunk and branches sticky and unsightly.
About the Author
Anna Aronson began working as a journalist in 2000 and spent six years at suburban Chicago newspapers before pursuing freelance work. She enjoys writing about health care topics, in particular obstetrics, pediatrics and nutrition. She received a Bachelor of Arts in journalism from Eastern Illinois University and is now studying for a Master of Science in medicine degree to become a physician's assistant.