Information and communication technologies play an important role in reforming traditional agriculture as well as agricultural development. In this context and to benefit from these technologies, a new irrigation strategy is proposed in this paper. A zoning irrigation system based on Internet of Things (IoT) is developed and tested, where the main objectives are the optimization of plant growing conditions and the reduction of water use and energy consumption. The proposed system based on a Wireless Sensors Network (WSN) was installed in different considered zones of a greenhouse. This network sends the data from the plant environment, such as soil humidity and temperature to a server (Raspberry pi) by means of radio-frequency (RF) communication. To control the irrigation, a fuzzy logic controller (FLC) processes these data and makes an intelligent and optimal decision. The developed system can monitor and control the irrigation in the greenhouse from anywhere and at any time by using a Human Man Interface (HMI) developed under Node-RED of IBM. The proposed system was applied to irrigate tomato plants in a real environment. Comparison of the irrigation performance with three other irrigation techniques shows that the amount of water and the consumption of energy by adopting the proposed method decreased significantly.