Plywood can be used for a raised garden bed, but it is important to consider the different grades of plywood and their potential effects on soil and vegetables. The 7 best wood choices for raised beds include pressure-treated Cedar, Cypress, Black Locust, Pine Oak, and Redwood.
Cedar is a popular choice for raised beds due to its excellent natural resistance. However, research has shown that chemicals used in plywood, including formaldehyde adhesives and copper azole, can leach into soil and vegetables in raised beds. Additionally, plywood may only last 1-2 years.
To build a wood raised garden bed, you can easily customize it to suit your needs. Building this elevated garden bed out of wood resistant to rot means it will last a long time compared to untreated wood and won’t leach any chemicals into the soil like pressure-treated wood.
Additionally, adding plywood backing to metal raised garden beds can help reinforce light-gauge corrugated metal and position it on 2×4 blocks. However, plywood should not be used for raised beds as it won’t last very long and may delaminate quickly when exposed to the elements.
In summary, using plywood for a raised garden bed is a simple and cost-effective solution for urban gardening. To create a lightweight and easy-to-move bed, aim for the thickest pieces of wood possible, such as 2″-thick boards. Plywood boxes are lightweight and ideal for urban gardening, but it is crucial to weigh the benefits and drawbacks before making a decision.
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