Growing Horseradish (Armoracia rusticana): Planting, Care & Harvest

Overview

Horseradish (Armoracia rusticana) is a vigorous perennial that spreads readily and lives for years. Choose a permanent location with this in mind.

Planting

• Sun: Full sun.
• Soil: Slightly acidic (pH 6.2–6.7), loosened to 8 inches deep and amended with compost.
• Root cuttings: Plant 6-inch root cuttings at a 45° angle, with the slanted cut end down and the top 2 inches below the soil line. This angle encourages more roots to form.
• Spacing: 10–12 inches apart in rows 3 feet apart.

Watering and Feeding

Water when the top inch of soil is dry until plants establish. After the first year, fertilize in spring with a balanced 10-10-10 fertilizer or top-dress with compost.

Harvest

Dig roots in fall starting the second year. Harvest a piece about the size of a carrot, wash well, and scrape under running water to avoid eye irritation. Store whole roots in a plastic bag in the refrigerator crisper for several months. For fresh sauce, grate outdoors or in a well-ventilated kitchen, mix with enough vinegar to cover, add salt, and refrigerate in a glass jar.

Division

Divide plants every 2 years in early spring as soon as the ground can be worked. A carrot-sized root piece is enough to start a new plant.