PlantOne application presents smart farming innovative tool which is powered by Arduino microcontroller and mobile application technology. This system innovation is equally important in today's modern agriculture. These technologies were integrated to help people with the best farming practices during CoVID19 outbreak. People explore growing plants in their backyard to supplement their food supply while others consider planting as avenue to one's mental and physical health. The study is motivated to design and develop a farming application that will monitor the soil pH and moisture content providing accurate and reliable knowledge management to farming enthusiast. The study utilized a qualitative and experimental research design to attain the objectives of the study. An Iterative Waterfall model was employed in the system development to attain user and business requirements. Researchers utilized Arduino microcontroller on its features to perform hardware and software integration. Powered by integrated development environment multiple sensors were utilized in the project application such as pH sensor, moisture sensor and ESP WiFi 8266 module. Android Studio, JAVA, Node.js, Android Kitkat and DB Browser for SQL was used in the robust development of a secured and reliable mobile application. The results of the study proves the PlantOne application to be an scalable and intelligent farming application tool in providing knowledge management on best farming practices. PlantOne was consistent “PASS” on the system evaluation of agriculture experts in the Regional Soil Laboratory of a PASS or FAIL rating. Finally, PlantOne is recommended to funding agencies as an innovative tool to smart farming.