In order to meet the increasing need for quality conscience crops and to utilize the resources efficiently, the concept of Greenhouse was introduced. It assists in accurate monitoring and controlling of various parameters, in order to nurture healthy crops. In this paper efforts are made to acknowledge the problems associated with maintaining precise environmental conditions, and to implement a sophisticated system to supervise the real-time monitoring and controlling operation inside the Greenhouse. The necessity for an Automated System deploying wireless communication and remote sensing is considered. This paper illustrates the implementation of a WSN (Wireless Sensor Network) based embedded system supported by ZigBee network (over IEEE 802.15.4) for organizing Greenhouse parameters. The establishment of various topologies supported by ZigBee network viz. Star topology & Mesh Topology are illustrated. It also demonstrates the real time supervision of parameters such as temperature, humidity as well as the total power consumption of the system, along with appropriate sensors. With the help of a PC based GUI application developed on Java platform graphs are plotted to evaluate the system performance.