Oasis Ceramic Self Watering Planter - Ivory Once-piece ceramic! No assembly required! Easy to use, environmentally friendly and waters plants automatically for up to 30 days.. Can be used with a large variety of plant types including ornamental and sensitive plants. Modern design allows for excess water and fertilizer to run through creating proper ventilation for the root system. Based on clay porosity and patent-pending concept water/moisture is absorbed through the clay by the soil and plant as needed!