The dried flowers are used to make medicine. People take cornflower tea to treat fever, constipation, water retention, and chest congestion. They also take it as a tonic, bitter, and liver and gallbladder stimulant. Women take it for menstrual disorders and vaginal yeast infections.
The edible flower of the cornflower can be used for culinary decoration, for example to add colour to salads. Cornflowers have been used historically for their blue pigment. Cornflowers are often used as an ingredient in some tea blends and herbal teas.