My large planters are 3' high and 20 feet long with wood dividers every 5...
My large planters are 3' high and 20 feet long with wood dividers every 5 feet. . The original homeowner built them for bulbs. 50% of this space is unused, and I would love to plant vegetables. Problem: the wood is treated. Is there anyway to line the planter with plastic, rubber, tin, or something so that I can plant these? Unfortunately these are behind the house where I can't enjoy the blooms.
Arsenic has not been used to treat lumber since December of 2003. The current treatment uses a copper based material which is of concern to organic gardeners. You can use a heavy plastic to line the inside of the garden bed which will help prevent any leaching into the soil. http://www.finegardening.com/how-to/articles/are-pressure-treated-woods-safe-in-garden-beds.aspx