At our planter box factory, drainage holes are included as a standard feature—not an add-on—on every single model we produce. We believe that proper drainage is fundamental to plant health, preventing root rot and waterlogging, which is why we integrate it into our core design specifications. When you order from us, whether it’s a small balcony planter or a large commercial trough, you will always receive pre-drilled, evenly spaced drainage holes. There is no need to pay extra or request a separate upgrade. We have standardized this across all materials—be it galvanized steel, powder-coated aluminum, or Corten steel—ensuring consistent quality and performance. Of course, for clients who require a contained system for indoor use or for growing aquatic plants, we offer optional rubber plugs that can be inserted to seal the holes. This gives you the flexibility to switch between draining and water-retaining modes without changing the base product. Additionally, if your project demands a custom drainage layout—such as a single central slot for a long railing planter or an increased number of small holes for succulents—our manufacturing team can accommodate those specifications during the production run. To summarize: standard drainage holes are always included at no extra cost, but we can customize their configuration or seal them with accessories upon request. Your plants will thank you for the breathability, and your budget will thank you for the transparency.