If you're diving into urban gardening, you might be wondering: do I need to line my planter boxes with anything before planting? The short answer is yes, and it's a crucial step for the health of your plants and the longevity of your containers. Lining your planter boxes serves several important purposes. Primarily, it protects the wood or material of the box from constant moisture and soil, which can cause rot and decay over time. This is especially vital for wooden planters. A liner creates a barrier, significantly extending the life of your investment. Furthermore, a proper lining helps with drainage control. While drainage holes are essential, a liner with pre-punched holes can prevent soil from washing out while still allowing excess water to escape, preventing waterlogged roots. You don't want to create a sealed, soggy environment.
So, what should you use to line your planter boxes? There are several excellent options. For a natural and breathable choice, landscape fabric or burlap is ideal. It allows water and air to pass through while containing the soil. For a more robust and waterproof barrier, consider a plastic liner, like a pond liner or even a heavy-duty garbage bag. Just be absolutely certain to punch ample drainage holes in the bottom. Another great modern option is using a coir liner, made from coconut husks, which is sustainable and provides excellent aeration. Avoid using non-porous materials without drainage holes, as this will drown your plants' roots.
The process is simple. First, ensure your planter box has several drainage holes in the bottom. Then, measure and cut your chosen liner material to fit the inside of the box, ensuring it covers the bottom and sides. If you're using an impermeable liner like plastic, use a drill or a screwdriver to create multiple holes in the bottom section of the liner, aligning with the box's drainage holes. Finally, add a layer of drainage material, such as small stones or broken pottery, over the liner before adding your potting soil. This extra step further improves drainage and prevents the holes from becoming clogged. Taking the time to properly line your urban planter boxes is a simple task that pays off with healthier plants and containers that last for many growing seasons to come.