ACQ Lumber. If you want to use a pressure-treated wood for your raised beds, look for lumber with a label stating it was treated with ACQ -- alkaline copper quat.
My raised bed vegetable garden beds are all pressure-treated lumber now. I feel ACQ is a good alternative to the older CCA. For Those Who Choose Not to Use Pressure Treated Lumber: Alternatives
If you buy new pressure treated SYP for your raised bed project, you can feel good about using it for garden projects where you plan to grow food. Why Copper Is a Good Choice Copper as an element binds strongly to soil , particularly to soils with a neutral pH of 6 to 7 and highly fertile soils.
Arsenic Compounds. The safety of pressure-treated wood for garden beds depends on what preservative was used to treat the wood. Wood treated with chromated copper arsenate or CCA can leach toxic ...
Tip: Modern pressure-treated lumber utilizing MCQ or MCA technology will not leach harmful chemicals and is considered safe for use around edibles. Alternatively, you can line the inside of the bed with pond liner to maintain a separation between the wood and soil .
Pressure-treated lumber, while widely known for being able to withstand the elements and often lasting decades instead of only a few years, is not the best choice for a raised bed, especially if that bed is being used to grow edibles.
Is Pressure Treated Wood Harmful to use in the Garden? When selecting wood to make raised beds often people will recommend avoiding pressure treated wood siting the preservatives may be harmful.
Re: Raised garden bed - Pressure treated lumber. DO NOT use pressure treated lumber for food beds, as the chemicals within the lumber will leach into the soil and plants. Use a naturally rot resistant wood, such as redwood or cedar, any wood high in tannins will do.
Over the years there has been a lot of talk about pressure treated lumber and its use in gardening, and specifically for raised beds. Like most things, the more people talk about a particular topic the more the truth gets diluted, and the myths and incorrect facts get shared as truths.
Should you go out and buy CCA pressure treated lumber to build your raised beds? Well no, you can’t. You see, despite the tiny safety risk, CCA pressure treated lumber was banned for consumer use by the EPA in 2003.
In the garden, this includes use as bed borders or trim; support for raised garden beds; plant stakes; and compost bins. This fact sheet explains the most widely used method for treating wood, examines the possible risks from gardening uses of treated lumber, and makes recommendations for reducing any such risks.
Note: YellaWood ? brand products are treated with a micronized copper wood preservative and are approved for use in applications such as a raised vegetable bed. Learn more here . Before you get started, please read our info on safety , fasteners and building tips .
Pressure treated lumber has a great advantage over not treated lumber. It does last longer than untreated wood and that means that fewer trees are required to be cut. There have been changes in the past 10 years that have removed the arsenic from treated lumber.
The safety of pressure treated lumber for raised bed gardens has been examined by several researchers. From what I've seen, the consensus is that the chemicals do leach out of the wood into the soil and are uptaken by the plants in very small amounts.
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