Dianthus barbatus, commonly known as sweet William, is a flowering plant belonging to the Caryophyllaceae family. It is native to Europe and Asia and is often cultivated for its attractive clusters of colorful flowers, which can be pink, red, or white. The plant typically grows to a height of 12 to 18 inches and blooms in late spring to early summer. Sweet William thrives in well-drained soil and prefers full sun to partial shade. It is a biennial or short-lived perennial, meaning it can live for two years or more under ideal conditions. This plant is popular in gardens and is often used in borders and as cut flowers.