• They're tanilised and nice and dry so I picked up some wood preserver today that I'll treat them with first. Will also be putting some hardcore at the bottom of the holes to try and keep them off the wet soil, a bit. They will be close to a concrete culvert which is 10ft below the garden level so hoping that drainage should be good.

  • The hardcore will achieve very little, the extra preserver won't do that much either. I have replaced dozens of rotted out posts, they rot at ground level not at the bottom, hence post savers are a good idea. If you leave your concrete slightly proud of soil level that will help considerably more for virtually no effort.