Managing Cavities in Poor Compartmentalizers Like Hackberry

Hackberries compartmentalize decay poorly. A hole from past improper pruning indicates internal decay. Filling cavities with foam is cosmetic only—it traps moisture and doesn't stop fungi. No treatment improves health or adds structural support.

Focus on tree vitality: fertilize annually, water during drought, and avoid further wounds. If the cavity compromises structural integrity, consult an arborist about cabling or removal. Otherwise, monitor and accept the tree's natural aging process.