Property line/tree neighbor question

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August West wrote:
You've answered your own question.

I don't know all the full laws here in NOLA about trees on property lines, but I'd guess that we share responsibility for that tree...

Discover what the law says. If you want to delineate property lines, have a survey done.

I don't think you are responsible for maintenance of a tree planted by your neighbor on his property.

And if you are? Then I presume you would be free to trim back (i.e., remove) any section of the tree that extends over the property line to your property.