Watering is the most important cultural practice and most laborintensive tast in daily greenhouse operation. Watering systems ease the burden of getting water to plats when they need it. Knowing when and how much the water is two important aspects of watering process. To make the gardener works easily, the automatic plant watering systemis created. There have a various type using automatic watering system that are by using automatic watering system that are using sprinkler system, tube, nozzles and other. This project uses watering sprinkler systembecausyit can water the plants located in the pots. This project uses Arduino board, which consists of A Tmega328 Microcontroller. It is programmed in such way it will sense the moisture level of plants and supply the water if required. This type of system is often used for general plant care as part of caring small garden. Normally, the plants need to be watered twice daily, morning and evening. So, the microcontroller has to be coded to water the plants in the greenhouse about two times per day. People enjoy plants, their benefits and the feeling related to nurturing them. However fo most people it becames challenging to keep them healty and alive. To accommodate this challenge we have developed a prototype which makes plants more self-sufficient, watering itself from a large water tank and providing itself with artificial sunlight. The pro-To type reports status of its current conditions and also reminds the user to refill the water tank. The system automation is designed to be assistive to the user. We hope that through this prototype people will enjoy having plants without the challenges related to absent or forgetfulness.