To answer your question directly: our planter box factory can custom-make planter boxes up to 96 inches (8 feet) in height, provided the design includes proper structural reinforcement for wind load and soil weight. For privacy screening, we typically recommend a height between 6 and 8 feet, as this blocks sightlines from ground level for most standing adults. Our engineering team can adjust wall thickness, internal bracing, and base dimensions to ensure stability at these heights. We also offer modular stackable systems that can reach even taller configurations if you need to exceed 8 feet, though we always advise consulting with our engineers about water access and plant selection. With a custom tall planter box, you can create a lush, green privacy barrier that not only shields your outdoor space but also enhances its beauty. We have delivered 7-foot-tall planters for residential patios and 8-foot-tall planters for commercial decks, all built to withstand weather conditions. So, yes—your privacy project can absolutely be elevated to the height you need, within reason and with the right engineering.