I have a tall hedge (some kind of conifer) that borders my back garden and quite a few roots are protruding through the lawn. How much root, if any, can be removed without damaging/killing the tree?
If you could post photos it would be helpful, but for well established trees you can get away with lopping a few off, although they'll probably come back eventually.
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I live in west central Scotland - not where that photo is...
"Have nothing in your garden that you don't know to be useful, or believe to be beautiful."