Absolutely. Our planter box factory specializes in custom lengths for long balcony railings, including 10-foot spans. But we always recommend producing them in sections rather than as one monolithic piece. Why? Because sectional design solves several practical challenges: easier transport through tight stairways and elevators, simpler installation on uneven balcony surfaces, and safer weight distribution across the railing structure. Each section can be engineered to lock seamlessly with the next, using internal connectors and weatherproof seals to create a continuous planting trough with no visible gaps or leakage points. We can split a 10-foot run into two 5-foot sections, three 3.33-foot sections, or any combination you prefer, depending on your railing posts and access constraints. Our factory uses marine-grade aluminum or powder-coated steel for the frame, with UV-stabilized HDPE liners that resist cracking and root penetration. We also customize the depth, drainage holes, and mounting brackets to match your specific balcony railing profile. Whether you need straight runs, corner sections, or curved edges, we can fabricate each modular piece to exact tolerances and pre-drill all attachment points. The result is a elegant, continuous planter that looks custom-made for your space—because it truly is. Just send us your railing dimensions and a few photos, and we will propose a sectional layout that maximizes both beauty and structural integrity. So yes, your 10-foot balcony railing is completely achievable, and the sectional approach ensures it will last for years while staying easy to handle and maintain.