http://durgan.org/2016/April%202016/21%20April%202016%20Horseradish/HTML/ 21 April 2016 Horseradish (Armoracia rusticana) Two horseradish plants were moved to a new bed to mature. They were over-wintered in pots in the ground. The plant is treated as an annual. Any piece of a root will re-grow. Two plants produce a large quantity of horseradish condiment.