Mullein (Verbascum thapsus) is one of the most powerful and easily accessible wild plants for lung health. Found growing along roadsides, open fields, and disturbed areas, this tall, woolly plant has been used for centuries as a traditional remedy for cough, bronchitis, asthma, and lung congestion. Whether you suffer from chronic respiratory issues or just want natural support during seasonal illnesses, mullein is a plant worth knowing.