Specialty culinary herb. Young leaves taste like celery and are used in spring salads and with potato, rice, and poultry dishes. Roots and young stems are also edible. Young stems can be cut, peeled, and used in salads. Stems are smooth, hollow, and thick. Attracts Beneficial Insects: If allowed to flower, provides pollen and nectar for beneficial insects such as bees, hoverflies, lacewing larva, lady beetles, parasitic wasps, and tachinid flies.