My 13-year-old River Birch has a rotting, dirt-filled wound from a trunk cut years ago. Should I clean it out and seal it to protect the remaining trunks?
Unfortunately, filling the cavity is not recommended and will provide no benefit. Depending on the extent of decay present, it may be possible to cable the remaining leaders together to add supplemental support to help compensate for the presence of decay. It is highly recommended you have an arborist evaluate the overall health and safety of the tree and provide you with options for course of action.
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