Siphon-fed water storage plates sit under each planter box here, so the soil draws moisture on its own between waterings instead of drying out midweek. The two boxes measure 16 by 16 by 12 inches with an interior of 14 by 14 by 7.5 inches, and drainage holes keep the roots from sitting wet. The trellis frame is PE-coated metal tubing that stays cool in direct sun and resists rust, while the planter panels are PP rattan that will not crack or fade. Two layouts come from the same parts, a compact 41 inch wide arch or a 60 inch spread, both standing 58 inches tall on a 16 inch deep footprint. Assembly needs no tools. Total weight is 16.5 pounds, so the whole bed can be shifted before planting.