Yes, treating or sealing urban planter boxes is highly recommended, especially for wooden ones, to ensure longevity and plant health. The primary goal is to protect the planter from moisture damage and soil decay. For wooden boxes, applying a non-toxic sealant or liner on the interior walls creates a crucial moisture barrier. This step prevents the wood from rotting and stops soil from sticking to the sides. Equally important is ensuring excellent drainage. Drill several holes in the bottom if none exist. Adding a layer of gravel or pebbles before the soil can further improve drainage and prevent waterlogging, which is fatal to most plants. Avoid using toxic chemical treatments like creosote or old railroad ties, as these can leach harmful substances into the soil and harm your plants. A simple, safe interior liner, such as food-safe plastic or landscape fabric, can be an effective alternative to sealants. Proper preparation—sealing, lining, and ensuring drainage—creates a healthy environment for roots, extends your planter's life for many growing seasons, and protects your investment in your urban garden.
Do urban planter boxes need to be sealed or treated in any way before planting?
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