The 4-Pot System is a gravity powered, automated watering systems that requires no pumps, timers or electricity to operate. It is extremely versatile and can be used for a wide range of plant types and sizes. Seasonal flowering plants and perennial shrubs thrive and produce an abundance of blooms and foliage due to the unique action of the AQUAvalve5™. This system allows the plant to go through a wet & dry cycle while dictating its own feeding regiment. All you have to do is fill the reservoir once a week and let your plants feed themselves!