Earth Tower Vertical Garden: 4-sided Wooden Planter on Wheels FINAL INVENTORY CLEARANCE SALE in time for the holidays Attractive 4 ft high, 4-sided Vertical Garden on Wheels Provides 46 feet of garden row in a 2x2 foot space Made of rot-resistant cypress wood with a beautiful non-toxic stain Interior watering and fertilizing reservoir (food-safe). Electricity Free!