Protecting your metal urban planter boxes from rust is crucial for their longevity and your plants' health. The right liner creates a vital barrier between the moist soil and the metal surface. For most gardeners, a durable plastic liner—like a heavy-duty garbage bag or specifically pond liner—is the most effective and cost-efficient choice. Ensure you puncture drainage holes in the bottom to prevent waterlogging. Alternatively, using a layer of landscape fabric can allow for better breathability and drainage while still protecting against soil contact. For a more permanent solution, consider applying a waterproof sealant or spray-on rubber coating directly to the interior metal before adding any other layer. Whichever method you choose, the key is to completely separate the soil from the metal to halt the corrosion process and enjoy your vibrant urban garden for years to come.
What kind of liner should I use inside my metal urban planter boxes to prevent rust?
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