Pressure-treated lumber ... their theory using two raised planter gardens, one made of untreated Douglas-Fir lumber, and a second made of Douglas-Fir treated with Copper Azole (CA-C): Soil and ...

Pressure-treated wood should be also avoided ... Another step you don't want to forget when gardening in wooden planter boxes is lining the inside. It's best to add a plastic liner to the inside ...