Proper drainage is crucial for healthy plants in urban planter boxes, and arranging drainage rocks correctly can make all the difference. Start by ensuring your planter has adequate drainage holes at the bottom. Cover these holes with a permeable landscape fabric or mesh to prevent soil from washing out while allowing water to escape. Add a layer of drainage rocks such as gravel, pebbles, or lava rocks about 1-2 inches deep, depending on your planter's size. Spread them evenly across the bottom to create a consistent base. This rock layer creates an air gap that prevents roots from sitting in water, reducing the risk of root rot. For best results, consider adding a thin layer of sand above the rocks before adding your potting mix, which will further improve drainage and stability. Avoid the common mistake of creating too deep a rock layer, as this unnecessarily reduces soil volume. Instead, focus on creating a balanced system where water can flow freely while your plants have enough soil to thrive in their urban environment.
What is the best way to arrange drainage rocks in the bottom of urban planter boxes?
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