NonToxic Plastic lining
I have a project where I am building raised beds out of salvaged lumber. Most of the lumber has been either painted or used as concrete forms. I have removed as much of the pressure treated lumber from the pile as I can identify. I've been trying to find out how to seal the wood to prevent it from leaching into the soil AND to help it survive the elements for at least three years.
I have found many references to using a 6ml plastic lining inside the beds to prevent any chemicals from the lumber getting into the organic soil that I will be growing my veggies in.
I have also found sites showing that plastic leaches bad chemicals into the soil as well.
Now I am trying to find out what plastic lining I can use that does not leach.
Can anyone help me?