This perennial is deep rooted with a whitish compact, knotted rhizome that forms a clump habit. It has upright stems with oblong to lanced-shaped dark green leaves and the terminal white saucer-shaped flowers appear in a cluster from spring to summer. 

Hardiness zones 3 to 10 

Armoracia rusticana is naturally found from Europe to Asia and eastern North America growing in well drained, fertile moist light soils in an open sunny position and is frost tolerant but drought tender. 

Horseradish is a hardy perennial that is grown for culinary or herbal use. It is planted in cottage gardens and can naturalise in open ground. It is found along watercourses or roadsides and may become a weed in some areas. ID 1073

Armoracia (ar-mo-RAH-kee-a) rusticana  (rus-ti-KAH-na)

Brassicaceae (brass-ih-KAY-see-ee)
(Cruciferae)
Cabbage, Mustard, Rapeseed, Turnip and Woad Family