Perennial. Hardy to USDA zone 4. A very popular herb in England, the snappy, clean, peppery taste of watercress is traditionally used on sandwiches during teatime. It also adds fabulous flavor to salads, omelets, and potato salads. Fresh markets in England sell flats of it, usually harvested as very young leaves. Though it is a water-loving plant, you don't have to have a stream or pond in your yard to grow it. Just be sure to keep the area well watered or grow it in pots and sit them in trays of water. It may also be grown inside in a sunny window during the winter. Immediate shipping in 2 1/2" pots. Dormant shipping in winter.