How can I effectively prevent and treat mint leaf blight in my garden?

To prevent and treat mint leaf blight in your garden, you can start by ensuring good air circulation around the plants, avoiding overhead watering, and planting mint in well-draining soil. If blight occurs, remove and destroy affected leaves, and consider using a fungicide labeled for mint blight. Regularly inspect your plants for early signs of blight and take prompt action to prevent its spread.