Hello everyone, I am a beginner gardener so please pardon my ignorance. I have a macadamia nut tree and some pine trees (Castlewellan Gold or Cupressocyparis Leylandii Cas. Gold) beside my house. The roots of one of these trees is destroying the concrete under my house. Would it be the macadamia nut? I understand their roots are shallow and the direction of the roots indicate this is the likely culprit. What do you think? Fran B
