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Tree Cavity from Broken Branch: Don't Fill It

Filling a trunk cavity with concrete, tar, or foam is outdated and harmful. These materials crack, trap water, and accelerate decay. The tree will compartmentalize the wound internally. The cavity may indicate structural weakness; consult an arborist, but do not fill the hole.

About Gardening: Flowering Plum After Hard Freeze: Scratch Test for Life; Tree Hole Repair: Don't Plug, Don't Seal, Let Nature Heal; Holes in Tree Trunk: Woodpecker or Squirrel Nest; Proper Pruning for a Broken Maple Branch; Oak Trunk Sprouts (Epicormic Branches): Prune or Keep?; Black Locust Storm Damage: Natural Healing Process; Mushrooms on Tree Trunks: A Sign of Internal Decay; Mystery Lawn Hole: Buried Tree Stump Collapse; Co-Dominant Trunks in Maple: Why Early Correction Prevents Future Failure; Natural Limb Grafting: When a Branch Fuses Back to the Trunk

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