Potato blight, commonly known as early blight & late blight, is a fatal illness that damages potatoes and other Solanaceae plants. It is caused by the water fungus Phytophthora infestans and can severely harm potato crops, resulting in lower yields and economic losses. Dark spots on leaves, stems, and tubers, as well as a white fungus on the underside of leaves in moist conditions, are symptoms of potato blight. The disease is highly contagious and spreads quickly in humid and moist environments, making it difficult to treat. In our paper, we present a CNN model for disease detection in plant leaves. The model we developed is trained to examine and comprehend a diseased leaf before identifying the cause of the disease.