Drainage systems for plant gardening in flowerpots, specifically a shaped porous rock or perhaps even an enclosed pouch having soil preservation capability and filling inside the enclosed pouch. Embodiments may include a pot hole locator which may place an enclosed pouch in a bottom of a pot prior to adding soil and planting a plant in a flowerpot. Other embodiments may include the addition of soil amendments, water retention elements, drying elements and the like. Filling may include plastic, various rocks, various stones, pebbles, synthetic materials and the like.