Five planter boxes hang from a 23 by 27 by 46 in frame, each 19.5 by 7.5 by 6 in and rated for 22 lbs per tier. The word hanging is literal: rather than sitting in fixed cradles, every box hooks onto the frame and lifts off again in one motion, which is what makes this modular. A box can come down to be planted at a bench, carried to a tap for cleanup, or swapped out mid-season without touching the other four. The five tiers are staggered rather than stacked flush, so each box stands clear of the one above and takes its own sunlight, and the arrangement makes the most of vertical space where a single wide bed would need floor area. Watering runs down the same logic: pour at the top tier and gravity does part of the work. Six drainage holes clear the surplus and a removable tray underneath catches what falls through, so nothing drips onto the ground. Rolling is handled by four wheels, two of them lockable universal casters and two directional, which is a combination that steers easily and then parks solid. Non-slip foot pads and a reinforced cross bar add stability once it stops, and the triangle heavy-duty metal frame keeps a 46 in tower steady under load. The boxes are PP, safe, smell-less and easy to maintain, and the assembled unit weighs 17 lbs empty.