Chicory is a summer perennial that develops from a basal rosette. Chicory looks similar to dandelion in the rosette form, but the lobes of the leaves are not opposite like those of dandelion. The lobes of dandelion also point toward the base. The flowers of chicory range from bright blue to purple in color. The flowers form on stems that range up to three feet in height, forming from June to October. Chicory reproduces by seed and is found throughout the United States except Florida.
Chicory is most troublesome in disturbed areas. It resembles dandelion while it is in the rosette, but if allowed to flower, it produces a tough tall flower stem. It usually will not flower if the turf is mowed below 2 inches. It thrives in thinner turf, and can be found in newly established turf. Cultural practices that promote a thick stand of turf will allow the grass to compete with chicory. Chicory is most prevalent in calcareous soils, but tolerates a wide range of soils.
For optimum control, make your post-emergence herbicide application to chicory that is actively growing and in the rosette to flower stage of growth.