If you’re wondering whether our planter box factory can handle custom sizes for a tight balcony, the answer is a confident yes. We specialize in tailoring planter boxes to fit even the most challenging spaces. For the specific question about the smallest width we can produce, our standard minimum is 6 inches (15 cm) for a single-row planter. However, if your balcony is narrower than that, we can go as low as 4 inches (10 cm) by using a slimmer design with specialized soil retention—perfect for herbs or small succulents. This is achieved through precise fabrication techniques and high-quality materials like powder-coated steel or cedar wood, ensuring durability without compromising aesthetics. Each order begins with a consultation to measure your balcony dimensions and discuss your planting needs. We also offer depth and height adjustments to optimize space, so even a 6-inch wide planter can hold enough soil for shallow-root plants. For ultra-narrow spaces, we recommend our wall-mounted linear planters, which can be as slim as 3 inches (7.6 cm) in width and attach directly to railing or walls. Just provide us with your exact width requirement, and our team will engineer a solution that maximizes your greenery without overcrowding your balcony. Remember, custom sizes come with a short lead time (usually 7-10 business days) and a lifetime warranty on craftsmanship. So, whether you need a 4-inch micro-garden or a 12-inch deep planter, we’re ready to create it for you.