I have built large grow boxes for my balcony using pressure treated wood. I will line the sides with plastic ground cover material and the bottom with permeable ground cloth so that the soil does not come in contact with the treated wood. I plan to grow veggies such as lettuce, bean, peas and tomatoes in them. I need to put slats of wood at the bottom under the permeable ground cloth to hold everything up.
My question is if I use treated wood under the permeable ground cloth with it leach up through the cloth into the soil?
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Thanks for the reply. I'm in Europe so I hope there are similar regulations here. Even if there is no arsnic, the wood has been treated with something 'nasty' that shouldn't be sprinkled on your breakfast cereal. I'm just wondering if these nasty chemicals will leach up through the permeable ground cloth or does leaching only go down?