![]() ![]() Plastic is probably your best bet for a raised garden bed liner if the soil in your raised beds is too dry and you need to retain moisture by preventing drainage.Ĭardboard is cheap and plentiful, but it will not last long as a raised garden bed liner.Ĭardboard is probably your best bet for a raised garden bed liner if you want a cheap and biodegradable option.įor more information, check out my article on using cardboard boxes to grow plants. If you aren’t sure, ask the manufacturer, or limit your use of plastic to flower bed liners (unless you will be eating the flowers). Some folks worry about whether plastic garden liners are nontoxic. These liners allow better drainage than other plastic sheet materials. the plastic liner on the sides prevents chemicals from getting into the soil from pressure-treated wood.Īnother option is to order plastic garden liners made of polypropylene fabric.the canvas liner allows water to drain out the bottom of the raised bed.Then, use a water-permeable material (such as canvas) to line the bottom of your raised bed. Your best bet is to use this type of plastic to line the sides of a raised bed made of older wood. Since these plastics are waterproof, they will not allow good drainage if used to line the bottom of your raised bed. ![]() Using a plastic tarp as a raised garden bed liner will not allow water through (unless you add drainage holes). If you use plastic that is not water-permeable, then water will have a hard time draining out of your raised bed. This keeps the soil too wet, especially on cool, rainy days. Raised Bed Liners May Not Allow Adequate Drainage Let’s start with a big concern for raised bed gardening: adequate drainage. Finally, if your raised bed is built from wood, a liner can keep water in contact with the wood, causing it to rot faster.In addition, you will need to move all of the soil in your raised bed to replace an old liner.Also, it can be easy to damage some liners when digging or replacing soil in your raised bed.First of all, a completely airtight and watertight liner material may not allow the drainage that your soil needs.Drawbacks Of Lining A Raised Garden Bedįor all their benefits, raised bed liners do have some drawbacks: You can learn more about the materials available for raised garden beds in my article here. (If you are looking for some good garden soil to fill or refill a raised bed, Ace Hardware has Miracle-Gro for vegetables & herbs available here). This will allow drainage through the bottom while preventing soil from contacting old wood that may contain chemicals. To prevent this, use a liner material (such as plastic) that will prevent leaching. If you are also worried about water drainage, try using cloth or some other water-permeable material for the bottom of your raised bed (and use plastic for the sides). Wood pallets may contain chemicals that you don’t want in your garden soil. ![]()
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