Horseradish - Armoracia rusticana - German Mustard
Horseradish - Armoracia rusticana - German Mustard
Horseradish - Armoracia rusticana - German Mustard
Horseradish - Armoracia rusticana - German Mustard
Horseradish - Armoracia rusticana - German Mustard
Horseradish - Armoracia rusticana - German Mustard
Horseradish - Armoracia rusticana - German Mustard
Armoracia rusticana
Horseradish, Pepper root, Pepper turnip
Young plant bought in December 2022.... It has developed brilliantly! Placed in partial shade. The foliage of a large olive tree shades it during heatwaves.
Myrtille, 10/03/2026
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We guarantee the quality of our plants for a full growing cycle, and will replace at our expense any plant that fails to recover under normal climatic and planting conditions.
Description
The horseradish, sometimes called German mustard, is cultivated for its long, fleshy root. Consumed as a condiment, it enhances sauces, raw vegetables, or meats with its pronounced taste. Planting in spring or autumn and harvesting from the 2nd year, from September to April.
Horseradish belongs to the Brassicaceae family (formerly Cruciferae), like cabbage, radishes, and wasabi. Its root is commonly used in Northern and Eastern Europe as a condiment, as a substitute for mustard. It is a fast-growing vegetable plant with large leaves. In spring, it develops small white flowers, about 60 cm (24in) tall.
In cooking, horseradish is generally used raw or added to dishes at the end of cooking to preserve its pungent and peppery taste. Finely grated, it is often consumed as a substitute for mustard to season raw vegetables, sauces, meats, and fish. Horseradish is rich in vitamins B and C, as well as minerals.
In the vegetable garden, carefully choose the location where you want to plant it. Indeed, this perennial and hardy plant will establish itself permanently. Horseradish, which can reach 90 cm (35in) wide, systematically regrows from fragments left in the soil. However, it does not spread.
Harvesting: horseradish is harvested from the 2nd year, from September until the end of winter. Gently uproot the roots with a fork, according to your needs.
Storage: cut the leaves 1cm (0in) above the collar. Freshly harvested roots can be kept for a few days in the refrigerator. For long-term storage, store the roots in sand, in a cool and well-ventilated place. They can also be frozen.
Gardener's tip: We recommend mulching the soil with thin successive layers of grass clippings, if possible mixed with dead leaves. This protection, which keeps the soil moist, also reduces weeding. Additionally, a thick mulch will make harvesting easier during the winter period.
Horseradish - Armoracia rusticana - German Mustard in pictures
Harvest
Plant habit
Foliage
Planting and care
Choose a sunny or partially shaded location. Horseradish thrives in most types of soil. In the previous autumn, add compost by scratching it in to a depth of 5 cm (2in), after loosening the soil. Planting can be done in spring, from March to May, or in autumn, from September to October.
Loosen the soil deeply. Dig a hole (3 times the size of the root ball), place the root ball and cover with fine soil. Firmly press down. Regularly water to keep the soil moist. If you wish to plant multiple young plants, space them 50 cm (20in) apart in all directions. Horseradish cultivation requires little maintenance. To obtain larger roots, cut off the flower stem.
Cultivation
Care
Intended location
Planting & care advice
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Hardiness is the lowest winter temperature a plant can endure without suffering serious damage or even dying. However, hardiness is affected by location (a sheltered area, such as a patio), protection (winter cover) and soil type (hardiness is improved by well-drained soil).
In temperate climates, pruning of spring-flowering shrubs (forsythia, spireas, etc.) should be done just after flowering.
Pruning of summer-flowering shrubs (Indian Lilac, Perovskia, etc.) can be done in winter or spring.
In cold regions as well as with frost-sensitive plants, avoid pruning too early when severe frosts may still occur.
The harvesting period indicated on our website applies to countries and regions in USDA zone 8 (France, England, Ireland, the Netherlands).
In colder areas (Scandinavia, Poland, Austria...) fruit and vegetable harvests are likely to be delayed by 3-4 weeks.
In warmer areas (Italy, Spain, Greece, etc.), harvesting will probably take place earlier, depending on weather conditions.
The sowing periods indicated on our website apply to countries and regions within USDA Zone 8 (France, UK, Ireland, Netherlands).
In colder areas (Scandinavia, Poland, Austria...), delay any outdoor sowing by 3-4 weeks, or sow under glass.
In warmer climes (Italy, Spain, Greece, etc.), bring outdoor sowing forward by a few weeks.
The planting period indicated on our website applies to regions in USDA Zone 9a (East Coast and Midlands: Dublin, Wexford, Waterford, Kilkenny, Portlaoise). It will vary depending on where you live:
- On the west coast and in the north-west (Galway, Limerick, Sligo, Donegal, Westport), delay planting by 1 to 2 weeks in spring and bring it forward by 1 to 2 weeks in autumn compared to the dates given, preferably choosing periods without strong winds.
- In the inland hills and plateaus (Wicklow Mountains, Macgillycuddy’s Reeks, Connemara, Killarney), it is best to plant in spring (April–May) or autumn (September–October), avoiding periods of waterlogged soil in winter and strong winds, which pose the main risk to newly planted trees in these areas.
The flowering period indicated on our website applies to regions in USDA Zone 9a, such as the East Coast and Midlands, including Dublin, Wexford, Waterford, Kilkenny and Portlaoise.
This will vary depending on where you live:
- On the west coast and in the northwest (Galway, Limerick, Sligo, Donegal and Westport), it will be delayed by one to two weeks compared to the given dates, due to stronger Atlantic winds and less spring sunshine.
- In the inland hills and plateaus (the Wicklow Mountains, the Macgillycuddy's Reeks, Connemara and Killarney), flowering will be delayed by two to three weeks. Flowering mainly occurs between May and July, with the limiting factors being less frost and more of the excessive humidity, strong winds and lack of sunshine that are characteristic of these areas.
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