Armoracia rusticana

USDA Hardiness Zone 4-7

Horseradish is grown for its root, which is typically ground into a flavorful pungent condiment.  Larger roots can become woody so roots around 1" diameter are ideal for consumption.  

Horseradish is prolific and spreads readily through root cuttings making it quite difficult to remove from an area where it has established.  Care should be exercised when selecting a planting location.  Container planting is a prudent choice for preventing an undesired invasion.