Armoracia rusticana (Horse radish)

Botanical name

Armoracia rusticana

Other names

Horse radish, Red cole, Pepper root, Pepper turnip, Red cole, Horseradish

Genus

Armoracia Armoracia

Species

A. rusticana - A. rusticana is a vigorous perennial with fleshy, pungently aromatic tap-roots used for making horse raddish.

Foliage

Deciduous

Fragrance

Has a strong aroma.

Habit

Clump-forming, Spreading, Upright

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Colour

Flower

White, Insignificant or absent in Summer

Foliage

Green in Summer

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How to care

Watch out for

Pests

Generally pest free.

Diseases

Generally disease free.

Specific diseases

Clubroot

General care

Pruning

Cut back after flowering. May be invasive.

Propagation

Divide in winter.

Propagation methods

Division, Seed

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Monthly care advice

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Where to grow

Armoracia rusticana (Horse radish) will reach a height of 0.5m and a spread of 0.5m after 1-2 years.

Suggested uses

Add to salads, Flavouring food and drinks, Beds and borders, Cottage/Informal, Foliage only, Wildlife

Cultivation

Plant in light, fertile and deep, moist but well-drained soil in full sun (ideally your kitchen). Water freely in dry conditions to inhibit bolting.

Soil type

Chalky, Clay, Loamy, Sandy (will tolerate most soil types)

Soil drainage

Well-drained

Soil pH

Acid, Alkaline, Neutral

Light

Partial Shade, Full Sun

Aspect

South, West

Exposure

Exposed, Sheltered

UK hardiness Note: We are working to update our ratings. Thanks for your patience.

Hardy (H4)

USDA zones

Zone 9, Zone 8, Zone 7, Zone 6, Zone 5, Zone 4

Defra's Risk register #1

Plant name

Armoracia rusticana (Horse radish)

Common pest name

Cassava whitefly; Cotton whitefly; Sweet potato whitefly; Tobacco whitefly

Scientific pest name

Bemisia tabaci non-European populations

Type

Insect

Current status in UK

Absent

Likelihood to spread to UK (1 is very low - 5 is very high)

2

Impact (1 is very low - 5 is very high)

5

General biosecurity comments

Non-European populations of Bemisia tabaci pose an additional risk to European populations due to the potential for introducing non-European viruses.

Defra's Risk register #2

Plant name

Armoracia rusticana (Horse radish)

Common pest name

Cassava whitefly; Cotton whitefly; Sweet potato whitefly; Tobacco whitefly

Scientific pest name

Bemisia tabaci European populations

Type

Insect

Current status in UK

Absent

Likelihood to spread to UK (1 is very low - 5 is very high)

2

Impact (1 is very low - 5 is very high)

4

General biosecurity comments

The UK has a protected zone in place for this pest which helps to mitigate the risk of entry and establishment. An EFSA opinion is currently being discussed at the EU Annexes Working Group which recommends further strengthening of the regulation.

Defra's Risk register #3

Plant name

Armoracia rusticana (Horse radish)

Common pest name

Lance nematode; Nematode; Lance

Scientific pest name

Hoplolaimus spp.

Type

Nematode

Current status in UK

Absent

Likelihood to spread to UK (1 is very low - 5 is very high)

2

Impact (1 is very low - 5 is very high)

4

General biosecurity comments

Nematode species potentially affecting a wide variety of crops; prohibition of soil likely to mitigate risk substantially; keep under review in light of interceptions or findings should they occur in the EU.

About this section

Our plants are under greater threat than ever before. There is increasing movement of plants and other material traded from an increasing variety of sources. This increases the chances of exotic pests arriving with imported goods and travellers, as well as by natural means. Shoot is working with Defra to help members to do their part in preventing the introduction and spread of invasive risks.

Traveling or importing plants? Please read "Don't risk it" advice here

Suspected outbreak? Click here for contact details to report to the relevant authority.

Date updated: 7^th March 2019 For more information visit: https://planthealthportal.defra.gov.uk/