Horseradish Plant Care

Horseradish (Armoracia rusticana) belongs to the Brassicaceae family within the Armoracia genus. Horseradish is native to Southeastern Europe and Western Asia. Horseradish is also known as Common Horseradish.

Horseradish displays a vigorous, spreading perennial growth habit, reaching up to 2 inches tall with a spread of approximately 1.5 inches. Horseradish produces small white flowers in clusters.

Leaf size: approximately 8 inches.

Armoracia rusticana requires watering every 7–10 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.

Horseradish thrives in full sun to partial shade light conditions. The optimal light range is 200–1000 lux. Avoid placing Horseradish in direct, harsh sunlight for extended periods, as this can scorch the foliage.

Armoracia rusticana grows best at temperatures between 45°F and 75°F. Horseradish prefers humidity levels of 40–70%.

Rich, well-draining soil with plenty of organic matter. Good drainage is essential for Horseradish to prevent waterlogging, which leads to root rot and fungal issues.

Divide and replant every 2-3 years in early spring. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.

Horseradish can be propagated through division, root cuttings.

Horseradish is susceptible to aphids, cabbage worms, flea beetles. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.

Horseradish grows outdoors in USDA Zone 11b. Native to Southeastern Europe and Western Asia, Horseradish is adapted to warm climates. In cooler regions, grow Horseradish as a houseplant or bring it indoors before the first frost.