Bigleaf maple is native to western Oregon and grows fast, wide, and heavy. In a forest, that works fine. In a backyard next to a house, fence, or driveway, it can become a problem as the tree matures.
Why bigleaf maples fail
Multiple trunks and tight forks. Many bigleaf maples grow as clumps or split low into several stems. The unions between them often contain included bark, which makes for a weak joint.
Long, heavy limbs. The tree pushes out long horizontal limbs that carry a lot of end weight, especially when wet and leafed out.
Internal decay. Old pruning wounds and broken limbs let decay fungi in. The tree can look healthy while the trunk is hollowing out.
Stump sprouts. Maples that were cut or broken in the past often regrow as clusters of sprouts, each loosely attached to the old stump.
What can be done
Structural pruning to reduce competing stems and correct weak unions while the tree is young
End-weight reduction on long limbs over targets like roofs and driveways
Cabling in some cases to support a weak fork
Inspection for decay at the base and major unions
Removal when the defects are too severe for the location
Bigleaf maples can be managed well for decades if they get attention early. A large, neglected maple next to a home is one of the most common hazard trees we evaluate in Eugene.
Call Wolfpack Tree Care at 541-556-9256 to have your maple assessed by an ISA Certified Arborist.
