The Permasteel Self-Watering Planter Box is perfect for both indoor and outdoor uses. Easily grow herbs, vegetables, plants & flowers. Crafted from polypropylene, it’s built to last and handle soil, water, and plants without any mess. Create the perfect environment for healthy, thriving plants – indoors or outdoors. The Self-Watering reservoir top elevates soil allowing the plant roots to absorb water, without it becoming soggy or stagnant. The Fill Tube allows you to add water directly to the reservoir, providing an alternative to watering plants by pouring water onto the soil surface.