Horseradish is a hardy perennial grown for its pungent roots which are long and narrow, sometimes to 2 feet (.6m) long. Grow horseradish as an annual, in the second year the roots can become tough and fibrous. Horseradish is best grown in containers; it spreads readily and can easily grow out of control. Horseradish will be ready for harvest 140 to 160 days after planting.
Spacing: 12 - 18"