Square at 40 inches on each side and 12 inches deep, this bed gives an even growing area with no long reach to the middle, which suits square-foot planting layouts. The base is open to the ground so roots grow down into the native soil, water drains through, and air reaches the root zone. Four reinforced corners hold the fir boards together and stop the panels from pulling apart once the soil is wet and heavy. The wood is untreated, leaving a plain surface you can stain, paint, or let weather to gray on its own. At 13.5 pounds the empty frame is easy to carry into position and fill in place, and it ships flat with screws and an instruction sheet.