Our Vertical Garden Stand has four heavy duty casters that roll over indoor or outdoor surfaces. A 10 gallon water reservoir allows you to keep your plants well-irrigated and healthy with our optional Gronomics pump irrigation kit. No more covering up plants due to severe weather, simply roll your Gronomics Vertical Garden inside or outside effortlessly. Also includes a 12V DC battery with pump and timer which mount to the back of the Vertical Garden creating a complete contained, self-watering system.