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A picture of a Horseradish

Horseradish

Armoracia rusticana

Also known as

Pepper Root, Pepper Turnip, Red Cole

Full Sun
Easy care
Light watering
Frost Hardy

7a

USDA zone

-18°C

Minimum temperature

Expected size

Height
Spread

50cm

Max

50cm

30cm

Min

30cm

Flowering

  • spring
  • summer
  • autumn
  • winter

This plant has no fragrance

More images of Horseradish

A photo of Horseradish
A photo of Horseradish
A photo of Horseradish

Horseradish Overview

Horseradish is used as a spice, grows up to 1.2 meters tall, and is primarily cultivated for its large, white, tapered root. It is a perennial plant with a tapering, fleshy taproot that grows up to 60 cm long and has large basal leaves with toothed margins. The white flowers appear mid-summer to mid-autumn. The intact horseradish root has hardly any aroma but when cut or grated, the broken down enzymes produce mustard oil, which irritates the mucous membranes of the sinuses and eyes. Grated mash should be used immediately or preserved in vinegar for best flavor. Once exposed to air or heat it will begin to lose its pungency, darken in color, and become unpleasantly bitter tasting over time.

Common problems with Horseradish

Generally pest and disease free

    Horseradish Companion Plants

    Potatoes, Fruit Trees, Yams, Plums

    How to harvest Horseradish

    The roots can be harvested as needed throughout the season. However, for peak flavour wait to harvest the roots until after the first killing frost. Store the roots in a cool, dark location to avoid spoilage and discolouration.

    How to propagate Horseradish

    Seed

    Sow seeds in spring with a spacing of 50 cm apart and a sowing depth of 5 to 7 cm. Keep moist.

    Division

    This is the easiest way of propagation. Break the mature, large plant mass into pieces and plant separately.

    Special features of Horseradish

    Attracts useful insects

    The flowers serve as food source to insects.

    Attractive leaves

    The young leaves are large and green, while mature leaves have many finely divided leaves! Often bth visible on the plant.

    Pot plant

    Drought resistant

    Other uses of Horseradish

    Medicinal. Food.

    Medicinal

    Internal and external bacterial infections can be controlled using horseradish. The roots, when used in their fresh state, can be used to clear sinuses and hay fever.

    Edible

    The roots are harvested for sources and spices. It is an ideal condiment to beef, pork, sausages and potato salad. The leaves can also be used in a salad.