When setting up urban planter boxes, selecting the right liner is crucial for plant health and container longevity. The best type of liner to use is a permeable geotextile fabric, often called landscape fabric.
This specialized fabric offers the ideal balance of functionality. It allows excess water to drain freely, preventing root rot—a common issue in confined urban planters. Simultaneously, it holds soil in place, preventing erosion during watering. Unlike plastic sheets, which can create soggy conditions, or no liner, which leads to soil loss and stains, geotextile fabric acts as a protective barrier. It shields wooden or metal planter boxes from constant moisture, significantly extending their life, while still letting roots breathe and access water.
For optimal results, line the entire interior of your planter box with the fabric, ensuring it covers corners and overlaps slightly. Secure it with staples or nails, then add a layer of drainage material like pebbles before filling with high-quality potting soil. This simple step ensures a thriving, low-maintenance urban garden.