Horseradish is a hardy vigorous herb, but can become a weed if grown in an open garden. It easily self-sows and is very difficult to dig out as roots can reach a depth of 4 meters (14 feet).
A better way to enjoy crops of horseradish is to grow it in containers. Choose a container wide and deep enough to allow the roots to grow to a minimum depth of 2 feet (60 cm).
- Young plants are best planted in autumn or early spring. Use light, moisture-retentive soil, with one part sharp sand to two parts compost.
- Place in full sun to partial shade and ensure they are regularly watered.
- Apply liquid fertiliser every two weeks until the end of August.
- To harvest, remove the roots from the pot after the first frost kills the leaves in the autumn. Select two or three healthy pieces to replant.
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