Proper drainage is crucial for healthy plants in urban planter boxes, and arranging drainage rocks correctly makes all the difference. Start by ensuring your planter has adequate drainage holes—without these, no amount of rocks will prevent waterlogging. Begin with a base layer of coarse, clean drainage rocks like lava rock, gravel, or pebbles, about 1-2 inches deep. This layer should be evenly distributed across the bottom to create space for excess water to collect away from plant roots. For best results, add a permeable landscape fabric or mesh screen over the rocks before adding soil. This barrier prevents soil from washing down and compacting the rock layer, which could clog the drainage system over time. Avoid using fine materials like sand, which can block holes, and skip the myth of adding broken pottery—it often does more harm than good. The goal is to balance moisture retention and drainage, so water flows freely while roots remain healthy. Regularly check that drainage holes remain clear, especially after heavy rain, to maintain optimal conditions for your urban garden.
What's the best way to arrange drainage rocks in the bottom of my urban planter boxes?
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