Sustainable agriculture requires the adoption of advanced technologies to increase crop yield and optimize resource use. This study details the design and implementation of a smart greenhouse monitoring and control system utilizing the ESP8266 and the Blynk Internet of Things (IoT) platform. The system incorporates multiple sensors to monitor environmental parameters such as temperature, humidity, soil moisture, and light intensity. Real-time data is transmitted wirelessly to the Blynk application, allowing remote access via smartphones or tablets. Automated actuators manage irrigation, ventilation, and shading to maintain optimal greenhouse conditions. Users can monitor environmental data, receive alerts for deviations from set thresholds, and manually override control actions through the Blynk interface. Experimental results indicate that the system enhances crop productivity, resource efficiency, and user accessibility. Integrating IoT-based monitoring with automated control offers a scalable and cost-effective approach to sustainable greenhouse management.