This wooden bucket style plant tender or soaker watering spike is ceramic. Plant tenders or watering spikes are used to help you keep the soil of potted plants or container gardens moist. They are designed to help you avoid overwatering plants and the need for constant attention. Using a plant tender is easy, simply insert the cone spike into the soil and fill the reservoir with water. The water soaks through the cone into the soil surrounding the plant. Use them indoors and outdoors. Great for keeping plants watered during vacations too.