8×12 Portable Greenhouse 8x12-Greenhouse-front Image 1 of 11 $4,848 plus tax and delivery. 6×6 Timber Base w/Pressure Treated Framing, 2 – 24×27 Windows, 5ft Walls, 7/12 Pitch Roof, Composite Trim Painted your Choice of Color, Potting Bench. 36 Month’s Rent to Own $238 a Month