Why It’s Important to Prune a Maple Tree
When pruning maple trees of any species, they tend to ooze sap more profusely than most other plants. The oozing sap may make you feel like you're injuring your plant. On the contrary, there are several good reasons to prune trees beyond simple aesthetics:
1. Address Wounds
Damaged branches are vulnerable entry spots for pathogens and pests. Pruning these areas helps keep infestations out, prevent infection, and strengthen the branches you leave alone.
2. Create Breathing Room
Cutting a maple tree back thins it out. This process increases airflow through its branches so they stay clean, dry, and free of harmful fungi.
3. Let in Light
Thinning out a maple also creates more room for sunlight to reach leaves that usually aren’t exposed.
Nature has designed plant roots and shoots to stay balanced. When you prune shoots, the tree devotes more resources to growing new ones.
When to Prune a Maple Tree
Your timing should vary based on the age of your tree. You should not prune a maple tree until its third year of life so it can get established and retain enough leaves to feed itself. In its third summer, start pruning your maple tree every other year or any year you see dead branches. Once a tree is 10 years old, you'll only need to prune it every five years.
What Time of Year Should You Prune Maple Trees?
The best time to trim maple trees is between mid-July and late August. This timeframe makes them unique among deciduous species, most of which are pruned while dormant in winter. Maples leak sap when pruned, which accounts for this difference. The sap flow slows late in the summer, allowing trees to retain more nutrients and fully heal before harsh winter conditions set in.