Pond Boss Forums GENERAL QUESTIONS Property Projects & Construction Garden Time

They used to use an arsenic based formula to treat wood, but it formula has been changed a while ago.

How much will leach into the soil? That's a good question. I have no idea.

If I was really worried about it, I'd still build the raised beds with the treated wood, and line them with EDPM pond liner, leaving the bottom of the bed open to the soil for water drainage. Minimal wood to earth contact, and it might let the wood last longer too.

Personal choice here, but I think I'll die from something else first.