Yes. Our planter box factory offers an optional liner system designed specifically to protect plant roots and improve the long-term performance of the planter. The liner option is not a one-size-fits-all add-on; it is selected according to the planter material, planting environment, drainage design, and the type of plants being grown. For most projects, we recommend a breathable geotextile or non-woven fabric liner that allows air and water movement while keeping soil in place. For planters exposed to strong sun, heat, or cold, an HDPE or rigid liner can add an extra protective layer between the soil and the planter wall. Coco fiber liners are also available for a more natural look and additional moisture retention. These liner options help reduce root stress by limiting direct contact with hot or cold surfaces, preventing soil from washing out through drainage holes, and supporting healthier root growth. They can also help keep wooden planter boxes cleaner by creating a barrier between wet soil and the wood. If root protection is a priority, we can customize the liner thickness, material, size, and drainage openings to match your planter box order. Please let us know your plant type, climate, and preferred liner material when requesting a quote, and our factory team will recommend the most suitable root-protection liner option for your project.