Thanks all, well the maple tree will be gone next render, the pool, which is where this started, is a PBR object dropped into a shallow SS shader depression and the main rocks will never conform to the bottom of the pool so that part's a FAIL. As the rest of the image has potential I may just remove it and stick with the Fakestones that are around the edge. Thinking a path, maybe roughly outlined with ground/lowlight level landscape lamps I have, to add definition to the depths of the woods. and some coloured flowers would indeed be in order...thinking pansies and poppies atm.
I think I can do an acceptable procedural cracked ground surface...I may scan my calendar and post that for reference if I can't get it working, for how-to tips.
Dping a quickish test on the workstation and it seems if I scale the PBR stones in the negative and lower the displacement of the pool it starts to look better...still rendering atm but looks hopeful on that bit anyhow.