Co-Dominant Trunks in Maple: Why Early Correction Prevents Future Failure

That forked trunk on your 'October Glory' maple—with included bark at the union—is a structural time bomb. Two competing leaders create a weak junction that will eventually split under weight.

The Inevitable Outcome

As both trunks thicken, the bark trapped between them (included bark) prevents strong wood formation. The union weakens progressively until one trunk tears away—often damaging property or the remaining tree.

Corrective Action Now

Remove the smaller trunk entirely, cutting as close to the union as possible. Don't apply wound dressing. The tree will look lopsided for a few years but will develop a strong, single leader and eventually regain attractive form.

Cabling is a temporary, risky alternative. Proper pruning now eliminates the hazard permanently.