Q: I have a Catalpa tree 18ft high near a garden wall.  I am getting worried about the roots of it … both for the wall and a
neighbours extension.  Does it have to go? Thanks, Bryan.

A: Catalpa is a very large tree and I would honestly say that it is better in a park than in a garden.  It would be wise to speak to an Aboreaculturalist for specific advice, however, you must check that they are insured to give you such advice.