Plant Profile

HorseradishArmoracia rusticana

Horseradish is a robust, perennial spice plant whose pungent root is versatile in the kitchen. It is easy to care for but requires a root barrier to control its spread.

Root vegetablesSpice herbsMustard family
Calendar
Horseradish (Armoracia rusticana): plant portrait - Root vegetables, Mustard family, Harvest January - March, October
Horseradish: plant portrait. harvest: January - March, October - December.

Quick profile

Key data

Growing calendar
JanFebMarAprMayJunJulAugSepOctNovDec
Planting outdoors
Harvest
Planting outdoorsHarvest

Suitable growing locations:

Outdoor garden bedRaised bedContainer

Good neighbors

potatoFruit tree

Avoid

No data

Indoor & direct sowing

Horseradish: Sowing and germination

Indoor sowing

Horseradish is typically not grown from seed but planted from root cuttings (Fechser).

Direct sowing outdoors

Horseradish is typically not grown from seed but planted from root cuttings (Fechser).

Light germinatorNo
Dark germinatorNo
Cold germinatorNo
Stratification neededNo
Pre-soaking recommendedNo

Planting & site

Horseradish: Planting and spacing

Planting outdoors

Planting of root cuttings (Fechser) in early spring.

Plant spacing30 - 50 cm
Row spacing60 - 90 cm
Plants per m²2 - 4 per m²
Bed widthfrom 60 cm

Temperature & frost

Horseradish: Temperature and site

Growing temperaturefrom 0 °C
Optimal temperature15 - 20 °C
Max. heatup to 30 °C
Frost sensitiveNo
Late frost sensitiveNo
Heat tolerancemedium
Cold tolerancevery high

Water & nutrients

Horseradish: Water, nutrients and care

Watermedium
Critical water phasesDuring main growth phase, During dry spells
Watering methodGround-level watering
Droughtmedium
Waterlogging sensitiveYes
Mulching recommendedYes
Nutrient needmedium feeder
Compost recommendedYes
Fertilizer sensitivitymedium

Container & growth

Horseradish: Container, support and growth

Container suitableYes
Pot sizeVolume: from 20 l; Recommended: from 30 l; Diameter: from 30 cm; Depth: from 40 cm
SupportNo
Height60 - 100 cm
Width30 - 60 cm
Root depth30 - 60 cm
Root spread30 - 100 cm
Yield500 - 1500 g

Year plan

Horseradish Calendar

Plants

Horseradish only develops its full aroma after the first frost, making it an ideal crop for late autumn and winter harvest.

Year overview
JanFebMarAprMayJunJulAugSepOctNovDec
Planting outdoors
Harvest

Recurring tasks

HarvestJanuary - March, October - December
Harvest roots in autumn after the first frost or in early spring before new growth. Roots can also remain in the ground over winter and be harvested...
Harvest rootsJanuary - February, December
frostfreier Boden: Only possible when the ground is not frozen.
Prepare soilMarch - April
vor der Pflanzung: Loosen deeply and enrich with compost.
Plant root cuttingsMarch - April
frostfreier Boden: Best results are achieved with 'Fechser' (side roots from the previous year).
Water regularlyMay - September
bei Trockenheit: Especially important for root development.
WeedMay - September
nach Bedarf: Avoid competition from weeds.
Select root cuttings for propagationOctober - November
während der Ernte: Select healthy side roots for planting next spring.

Relevant now

June

  • No additional single task

Next up

July

  • No additional single task

Monthly tasks

Single tasks from monthly data; repeated seasonal windows are shown in the overview above.

Harvest

January

Quiet month

February

Quiet month

March

Harvest roots

Harvest

  • Harvest rootsvor dem Neuaustrieb: Last harvest before strong new growth.

April

No additional single task

May

Quiet month

June

Quiet month

July

Quiet month

August

Quiet month

September

Quiet month

October

Harvest roots

Harvest

  • Harvest rootsnach dem ersten Frost: Flavor becomes more intense after the first frost.

November

Harvest roots

Harvest

  • Harvest rootsfrostfreier Boden: Flavor becomes more intense after the first frost.

December

Quiet month

Flowering & pollination

Horseradish Flowering & pollination

Flowering period

June - August

Flower type

Small, four-petaled flowers in panicles

Flower color

White

Self-fertility

self-fertile

Pollinator needed

no

Overview

Horseradish flowers are pollinated by insects.

Notes

Horseradish rarely flowers in garden cultivation, as energy is directed to root development. If it does flower, the blossoms are inconspicuous.

Companion guide

Horseradish Companion guide

Companion guide

Good neighbors

potatoFruit tree

Avoid

No data

Use & storage

Horseradish Use & storage

Harvest

Harvest roots in autumn after the first frost or in early spring before new growth. Roots can also remain in the ground over winter and be harvested as needed.

Storage

Store in a cool, dark, and moist place, ideally buried in damp sand or moist soil in a cellar or root cellar. Freezing grated horseradish is also an option.

Storage life

Fresh roots: 3-6 months; Grated and frozen: up to 12 months.

Flavor

Pungent, spicy, piquant, with a slightly earthy note. The pungency is volatile and dissipates when cooked.

Harvest

Harvest roots in autumn after the first frost or in early spring before new growth. Roots can also remain in the ground over winter and be harvested as needed.

Culinary uses

As a pungent condiment for meat (especially beef, boiled beef, roasts)With fish and smoked salmonIn sauces, dips, and dressingsIn salads (grated)For seasoning eggs and cheeseIn soups and stews (sparingly)

Processing

Grate and use freshProcess into horseradish sauceFreeze (grated or in pieces)Pickle in vinegar

After harvest

Clean harvested roots of soil, separate fine side roots (Fechser) for propagation, and prepare main roots for storage. Do not wash if they are to be stored.

Edibility & safety

Horseradish Edibility & safety

For people

In brief: which parts are edible, which parts remain risky, and whether raw consumption makes sense.

Edible parts:Root (rhizome), Young leaves (sparingly in salads)
Caution parts:Older leaves (very pungent and fibrous), Large quantities of leaves
Raw consumption:Yes, horseradish is traditionally and most commonly consumed raw and freshly grated to enjoy its full pungency.

Safety notes

Horseradish contains glucosinolates, which are responsible for its pungency. In large quantities or for sensitive individuals, these can cause gastrointestinal discomfort. The fumes released during grating can irritate eyes and mucous membranes.

Animal safety

For animals, the specific plant part matters here: some parts may be suitable, while others should be avoided. At least one critical rating is listed for 8 animal types.

Animal safety by plant part

Each row shows which parts are more suitable and which parts are critical.

Companion animals

Dog icon for animal safety ratingDog

No suitable parts listed

All plant parts (especially in large quantities), Fumes during grating

Risk factors

Consumption of large quantities, Sensitive animals, Inhalation of fumes during grating

Symptoms

Gastrointestinal upset (if large quantities consumed), Eye and mucous membrane irritation (from fumes)

observe

The pungent glucosinolates can cause GI irritation in dogs, especially if large amounts are consumed. Fumes can irritate eyes and respiratory tract.

Open animal page
Cat icon for animal safety ratingCat

No suitable parts listed

All plant parts (especially in large quantities), Fumes during grating

Risk factors

Consumption of large quantities, Sensitive animals, Inhalation of fumes during grating

Symptoms

Gastrointestinal upset (if large quantities are consumed), Eye and mucous membrane irritation (from fumes)

observe

The glucosinolates are responsible for the pungency and can lead to GI issues in sensitive animals or in large quantities. No species-specific data for cats, but general plant information suggests low risk if not consumed excessively.

Open animal page
Rabbit icon for animal safety ratingRabbit

No suitable parts listed

All plant parts (especially in large quantities), Fumes during grating

Risk factors

Consumption of large quantities, Sensitive animals, Inhalation of fumes during grating

Symptoms

Gastrointestinal upset (if large quantities are consumed or in sensitive animals), Eye and mucous membrane irritation (from fumes)

observe

Horseradish is not classified as toxic for rabbits, but the glucosinolates can cause gastrointestinal upset if consumed in excess. The pungency may be unpleasant for rabbits. There is no specific data on rabbit safety, so a conservative classification is made.

Open animal page
Guinea pig icon for animal safety ratingGuinea pig

Root (rhizome, very small amounts)

Leaves, Stems, Large amounts of the root

Risk factors

Consumption of large quantities, Consumption of leaves or stems, Individual sensitivity

Symptoms

Gastrointestinal upset (bloating, diarrhea), Mucous membrane irritation (with very high doses or sensitive animals)

observe

Horseradish root can be offered in very small amounts as a treat. The glucosinolates can cause gastrointestinal issues if consumed excessively. Leaves and stems are not suitable.

Open animal page
Hamster icon for animal safety ratingHamster

Root (rhizome, very small amounts)

Leaves, Stems, Large amounts of the root

Risk factors

Consumption of large quantities, Consumption of leaves or stems, Individual sensitivity

Symptoms

Gastrointestinal upset (bloating, diarrhea), Mucous membrane irritation (with very high doses or sensitive animals)

observe

No direct species-specific source was found for hamsters. This is a cautious inference from the guinea pigs profile and the known plant-part risks.

Open animal page
Budgie icon for animal safety ratingBudgie

No suitable parts listed

All plant parts (especially in large quantities), Fumes during grating

Risk factors

Consumption of large quantities, Sensitive individuals, Inhalation of fumes during grating

Symptoms

Gastrointestinal upset, Eye irritation (fumes), Mucous membrane irritation (fumes)

observe

No specific data available for budgies. Glucosinolates can cause gastrointestinal upset in birds. The pungency and irritation from fumes should also be considered.

Open animal page

Farm animals

Horse icon for animal safety ratingHorse

No suitable parts listed

All plant parts (especially in large quantities), Fumes during grating

Risk factors

Ingestion of large quantities, Individual sensitivity, Inhalation of fumes during grating

Symptoms

Gastrointestinal upset (if large quantities ingested), Eye and mucous membrane irritation (from fumes)

observe

There are no specific reports of poisoning in horses, but caution is advised, especially with the leaves and stems.

Open animal page
Chicken icon for animal safety ratingChicken

No suitable parts listed

All plant parts (especially in large quantities), Fumes during grating

Risk factors

Consumption of large quantities, Sensitive animals, Inhalation of fumes during grating

Symptoms

Gastrointestinal upset (if large quantities consumed), Eye and mucous membrane irritation (from fumes)

observe

No specific data found for chickens. Glucosinolates can cause gastrointestinal upset if consumed in excess. The pungency may limit acceptance as feed.

Open animal page
Duck icon for animal safety ratingDuck

No suitable parts listed

All plant parts (especially in large quantities), Fumes during grating

Risk factors

Consumption of large quantities, Sensitive animals, Inhalation of fumes during processing

Symptoms

Gastrointestinal upset (if large quantities consumed), Eye and mucous membrane irritation (from fumes)

observe

No specific data available for ducks. Glucosinolates can cause gastrointestinal irritation in poultry, especially if large quantities are consumed. Fumes can also be irritating.

Open animal page
Goose icon for animal safety ratingGoose

No suitable parts listed

All plant parts (especially in large quantities), Fumes during grating

Risk factors

Large quantities of the plant, Sensitive animals, Inhalation of fumes during grating

Symptoms

Gastrointestinal upset (in large quantities), Eye and mucous membrane irritation (from fumes)

observe

No specific information found regarding the toxicity of horseradish for geese. Glucosinolates may cause gastrointestinal upset if consumed in excess. The plant is not known as a primary feed for poultry.

Open animal page
Sheep icon for animal safety ratingSheep

Root (rhizome), Young leaves (sparingly)

Older leaves, Large quantities of leaves

Risk factors

Overconsumption, Consumption of older leaves

Symptoms

Gastrointestinal upset (with overconsumption)

observe

No direct species-specific source was found for sheep. This is a cautious inference from the goats profile and the known plant-part risks.

Open animal page
Goat icon for animal safety ratingGoat

Root (rhizome), Young leaves (sparingly)

Older leaves, Large quantities of leaves

Risk factors

Overconsumption, Consumption of older leaves

Symptoms

Gastrointestinal upset (with overconsumption)

observe

Horseradish is safe for goats in moderation, especially the root. Large quantities or older leaves can cause gastrointestinal upset due to glucosinolates. The pungency itself is generally not an issue for goats, but quantity is key.

Open animal page
Cattle icon for animal safety ratingCattle

Root (rhizome), Young leaves (sparingly)

Older leaves, Large quantities of leaves

Risk factors

Overconsumption, Consumption of older leaves

Symptoms

Gastrointestinal upset (with overconsumption)

observe

No direct species-specific source was found for cattle. This is a cautious inference from the sheep profile and the known plant-part risks.

Open animal page
Pig icon for animal safety ratingPig

Root (rhizome) in small amounts

Leaves (in large quantities), Seeds, Large amounts of the root

Risk factors

Consumption of large quantities, Consumption of leaves or seeds, Sensitive animals

Symptoms

Gastrointestinal upset (nausea, vomiting, diarrhea), Mucous membrane irritation (from fumes)

observe

The root (rhizome) of horseradish can be fed in small amounts as a treat. Large quantities or consumption of leaves and seeds can lead to gastrointestinal upset due to glucosinolates. The fumes released during grating can be irritating.

Open animal page

These guidelines are for general information only and do not replace veterinary diagnosis. If critical plant parts were ingested or the animal shows unusual behaviour or symptoms, seek veterinary advice.

Max risk

unknown

Highest status

do not feed

Urgency

observe

Saving seed

Horseradish Saving seed

Seed saving

no

Practical tips

Horseradish Practical tips

Common beginner mistakes

Not using a root barrier and then experiencing uncontrolled spread.Choosing pots that are too small for balcony cultivation, leading to fibrous roots.

Success pattern

Planting root cuttings in spring in well-prepared soil with a root barrier.Regular watering and occasional compost applications lead to strong, juicy roots.

High-impact tips

A deep root barrier (at least 60 cm) saves years of trouble with spreading.Harvest after the first frost for the best flavor.

Grower observations

Horseradish is surprisingly robust and forgiving of occasional neglect, as long as the soil isn't too wet.The pungency of the root varies greatly depending on location and harvest time; it's most intense after the first frost.

Plant Profile

Additional plant images

Horseradish (Armoracia rusticana): whole plant for plant portrait - Root vegetables, Mustard family, Harvest January
Horseradish (Armoracia rusticana): whole plant for plant portrait - Root vegetables, Mustard family, Harvest January

Health

Pests, Diseases

Plant health

Cabbage Root FlySlugsWhite blisterLeaf spot diseaseRoot rotNitrogen deficiencyPhosphorus deficiencyPotassium deficiencyUncontrolled spreadingBolting

Diagnosis help

Horseradish Diagnosis help

Pest groups

Flea beetlesRoot fliesSlugs/Snails

Disease groups

Rust fungiLeaf spot diseasesRoot rot

Prevention

Site selection and soil preparation (deep, loose, humus-rich)Adequate plant spacing for good air circulationConsistent water and nutrient supplyUse of root barriers against uncontrolled spreadRegular monitoring for pests and diseasesCrop rotation (for the site)

Diagnosis

Look for changes in leaves (discoloration, holes, spots), stunted growth, and the condition of roots during harvest. If root rot is suspected, check the soil for waterlogging.

Cultural prevention

Provide deep, loose, and humus-rich soilEnsure adequate plant spacing for good air circulationUse root barriers to prevent uncontrolled spreadRegular and consistent watering, avoid waterloggingSupply with compost or well-rotted manure in spring

Monitoring

Regular inspection of leaves for feeding damage, spots, or discolorationCheck roots for rot or pests during harvest

First response

Remove and destroy affected plant partsFor pest infestations, promote beneficial insects or use organic sprays (e.g., neem oil)For fungal infections, apply plant strengthening agents (e.g., horsetail broth)Improve soil for root rot

Diagnostic rules

Small holes in leaves

Possible causes: Meerrettich blattkaefer

  • Check plants for small, jumping beetles

Wilting leaves despite moist soil

Possible causes: Cabbage Root Fly, Root rot

  • Check root area for tunnels or rot
  • Check soil for waterlogging

White, pustule-like spots on underside of leaves

Possible causes: White blister

  • Check humidity and plant spacing

Leaves light green to yellowish, especially older leaves

Possible causes: Nitrogen deficiency

  • Soil analysis, check last fertilization

FAQ

How do you plant horseradish?

Horseradish is planted in spring from root cuttings (Fechser). These are placed diagonally into deep, loose, and humus-rich soil. A root barrier is strongly recommended to prevent uncontrolled spreading.

When do you harvest horseradish?

The main harvest takes place in late autumn after the first frost, as the flavor is more intense then. Alternatively, you can harvest in early spring before new growth. The roots can also remain in the bed over winter if the ground is not frozen.

How do you prevent horseradish from spreading too much?

To prevent uncontrolled spreading, using a deep root barrier (at least 60 cm) is essential. Alternatively, horseradish can also be grown in large, sturdy containers.

Can you grow horseradish in a pot?

Yes, horseradish can be grown in a pot, but due to its vigorous root growth, it requires a very large container (at least 20-30 liters volume and 40 cm depth) with good drainage.

Why is my horseradish woody?

Fibrous or woody roots can result from plants being left in the ground too long, drought stress, nutrient deficiency, or overly heavy, compacted soils. Regular harvesting and good soil care prevent this.

Is Horseradish safe for Dog?

Horseradish is classified as do not feed for Dog. Risk: unknown. Urgency: observe. The pungent glucosinolates can cause GI irritation in dogs, especially if large amounts are consumed. Fumes can irritate eyes and respiratory tract.

Is Horseradish safe for Cat?

Horseradish is classified as do not feed for Cat. Risk: unknown. Urgency: observe. The glucosinolates are responsible for the pungency and can lead to GI issues in sensitive animals or in large quantities. No species-specific data for cats, but general plant information suggests low risk if not consumed excessively.

Is Horseradish safe for Rabbit?

Horseradish is classified as do not feed for Rabbit. Risk: unknown. Urgency: observe. Horseradish is not classified as toxic for rabbits, but the glucosinolates can cause gastrointestinal upset if consumed in excess. The pungency may be unpleasant for rabbits. There is no specific data on rabbit safety, so a conservative classification is made.

Is Horseradish safe for Budgie?

Horseradish is classified as do not feed for Budgie. Risk: unknown. Urgency: observe. No specific data available for budgies. Glucosinolates can cause gastrointestinal upset in birds. The pungency and irritation from fumes should also be considered.

Guides

Related guides

Garden guides

Sources

Public sources

  1. Wikidata entity

    Wikidata · 2026-05-14

  2. GBIF species match

    GBIF · 2026-05-14

  3. Deutschsprachige Wikipedia: Meerrettich

    Wikipedia · 2026-05-14

  4. English Wikipedia: Horseradish

    Wikipedia · 2026-05-14

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