Hibiscus plants are known for their large, colorful flowers that make a decorative addition to a home or garden. They also have medicinal uses. Flowers and leaves can be made into teas and liquid extracts that are used to treat a variety of conditions.Hibiscus flowers come in many colors. They can be red, yellow, white, or peach-colored, and can be as big as six inches wide.Hibiscus is used for treating loss of appetite, colds, heart and nerve diseases, upper respiratory tract pain and swelling (inflammation), fluid retention, stomach irritation, and disorders of circulation; for dissolving phlegm; as a gentle laxative; and as a diuretic to increase urine output.