Evergreen tree in neighbor yard
My neighbor has a big evergreen tree couple feet from our fence. Roots are destroying my garden. I read on internet that arborists consider Cedar tree an invasive pest plant. I told this to my neighbor but he wants to see a source of this information, he thinks that cedar tree is very good, that it kills bugs and does not believe me.
Does somebody know a source of information about the danger of having cedar tree in small backyard (roots invading sprinklers pipes, sewer lines, ruining the foundations on homes). I want to show this to my neighbor, maybe then he can consider removal of this tree.
Also, looks like Washington state law allows me to prune roots of the tree along my property line. Does somebody knows will I’ll be responsible if something happens with this tree after I prune its roots?