The Garden Bug: Horseradish
By Brenda Weaver
Horseradish (Armoracia rusticana) is a hardy perennial herb that has been cultivated for at least 3,000 years. It thrives in temperate climates, growing best in deep, rich soil in a sunny location.
In early spring, before planting horseradish, spade or rototill the soil 8 to 10 inches down. Mix in generous amounts of compost or other organic material, then let the soil settle a few days before planting horseradish root cuttings.
Source: extension.umn.edu