Question: We have a can of spray foam that says it can be used to fill cavities in tree trunks. There’s a hole in one of our trees where a branch was removed — it’s about waist-high. The hole extends ...

This maple is live and healthy despite a huge cavity in its trunk. This tree is structurally compromised but does not pose a risk because it will do no damage when it fails. Surrounding trees in the ...

I can’t seem to pass a hollow tree without stopping to snoop. If there is a cavity within reach, an investigation is in order. Wear and tear around a hole, evidence of food items on the ground, or ...

As a tree guy, I get a lot of questions about cavities, or "hollows" in trees. Naturally, when homeowners notice a hollow spot on a tree, especially if it is oozing an ooky looking black liquid, they ...