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How to help heal a large wound in very old oak tree

Michael Folk
2 months ago

I purchased my home 3 years ago and one of my very old and seemingly healthy oaks has a massive open wound that's destroying the core of the tree. It has some serious growth theying to heal itself but I want to do everything to make sure it survives. It's about 10 feet around at the bast and the wound is 6 to 7 feet tall and about 1 foot wide. I would love any advise on how to help it close up or atleast keep water and insects out of it.

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