I am starting a new organic vegetable garden and plan to use cedar boards to build the beds. I would like to preserve the wood but don't want to use anything with copper, boron, etc. I heard of Life Time Wood Treatment made by Valhalla on Saltspring Island. They say it's completely safe but I am sceptical unless I know what the ingredients are. Does anyone know what is in it? I have consiered using other materials such as bricks, stone, etc. but my veg patch is small and I want to maximize the growing area. Any other suggestions would be greatly appreciated.