This is
Maliner Kren horseradish. Horseradish is a perennial. It rarely produces seeds so it will have to be grown from root cuttings. I ordered mine online in the spring, but almost immediately after it arrived I began seeing it in nurseries and even in the plant departments of Home Depots, etc. Although horseradish is said to bloom in the summer, mine has never bloomed. The flowers are white and fragrant, but they should be removed so that the plant concentrates all its energy on root development. Horseradish will spread and the roots can grow very deep. I planted mine in a tub so that I wouldn't have to worry about invasive spreading.
Horseradish root can be used as a condiment - ground and mixed with vinegar and dry mustard. But it also has medicinal uses. It is traditionally used as an antiseptic and stimulant. It is also a laxative and a strong diuretic. It cleans sinuses and treats inflamed gums. It aids digestion and
respiratory problems. It is reported to have antibiotic properties. Horseradish juice is used to fade freckles and liver spots.