If you take advice from Rodale’s Organic Life, you won’t use any sort of treated lumber for your garden beds.
Chromated copper arsenate (CCA) is a type of treated lumber that is not allowed for residential use since Dec. 31, 2003.
There are many other choices that the industry uses. Here are some articles about these choices and their possible health issues.
- OSU soils testing lab.
- U. of Missouri
- EPA Overview
- CCA – not used today.
- Penn State Extension
- Oregon State University
Wood Prices- 2″ x 12″ x 8′ three pieces
$27- Prime Kiln-Dried Southern Yellow Pine
$45 – Cedar-Tone Pressure-Treated Lumber – MCA – Micronized Copper Azole
This Old House Video – Cedar
Pine – 4 x 4 Raised Bed