Metal urban planter boxes add a sleek, modern touch to any city balcony, rooftop, or patio. To ensure their longevity and keep them looking their best, regular maintenance to prevent rust is crucial. Here’s a practical guide to the required care.
First, start with proper selection. Opt for planters made from corrosion-resistant metals like galvanized steel, aluminum, or corten steel, which naturally forms a protective rust patina. Regardless of the material, a key step is ensuring excellent drainage. Always use a liner or ensure drainage holes are clear. Stagnant water is the primary enemy of metal, accelerating corrosion from the inside out.
Regular cleaning is fundamental. Every few months, empty the planter and wash the interior and exterior with a mild soap and water solution. This removes dirt, mineral deposits, and organic matter that can trap moisture. For tougher grime, a soft brush works well. Always rinse thoroughly and allow the planter to dry completely before refilling.
The most proactive measure is applying a protective barrier. For non-corten steel planters, inspect the surface annually. Light surface rust can be sanded off with fine-grit sandpaper. Once clean and dry, apply a fresh coat of a rust-inhibiting primer and a high-quality exterior paint or sealant designed for metal. For a more natural look, a clear protective spray sealant can be used. Pay special attention to seams and the bottom, where moisture often collects.
Seasonal care makes a significant difference. During harsh winters or prolonged rainy seasons, consider moving planters to a more sheltered location if possible. Elevating planters slightly off the ground with feet promotes air circulation and prevents water pooling. Avoid letting soil constantly press against the metal sides; a thick plastic liner can provide an extra layer of protection.
By incorporating these simple steps—choosing the right metal, ensuring drainage, cleaning routinely, and applying protective coatings—you can effectively prevent rust and enjoy the durable, industrial charm of your metal urban planters for many years to come.