Flowers can help heal the common cold. While plants and flowers aren’t exactly the cure to the common cold but they can certainly help make a dent in some illnesses. During winter months especially – when the lack of humidity breeds infection – flowers add moisture to the air. This moisture helps with dry skin, dry throat and dry cough: all factors that contribute to seasonal illness. This additional moisture contributed by plants and flowers helps prevent, or at least shortens, the life of the common cold and helps people return to good health.