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IIIFolio · plant profile№ 59E9edible
Data provenancePermapeopleTreflePFAFPOWOreviewed 17 Oct 2026methodology → read

Japanese Horseradish

Wasabia japonica
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Wasabia japonica (Japanese Horseradish) — botanical photograph
Pl. 59E9 — Wasabia japonica
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Overview

Japanese Horseradish, scientifically known as Wasabia japonica, is a perennial plant native to Japan, Korea, and Sakhalin. This plant thrives in environments with partial sun or shade, making it adaptable to various light conditions. It prefers soil that can range from light (sandy) to heavy (clay), and grows to about 0.3 meters tall. The edible parts of the plant include its leaves and root, which are commonly used for culinary purposes. Known for its pungent flavor, Japanese Horseradish is valued in both traditional and modern cooking. One distinctive feature is its ability to grow well in a variety of soil types, making it versatile for gardeners in different regions. The plant has been introduced to Taiwan, expanding its cultivation range. While not traditionally used for medicinal purposes, its pungent compounds can contribute to a robust flavor in dishes. Japanese Horseradish thrives in moist, well-draining soil and is hardy in zones 7-10, making it suitable for temperate regions. Keep the soil consistently wet, and ensure the plant has ample water. The perennial can be propagated through division, and its leaves and roots can be harvested for culinary use.

Quick answers

What is Japanese Horseradish?

Japanese Horseradish, scientifically known as Wasabia japonica, is a perennial plant native to Japan, Korea, and Sakhalin. This plant thrives in environments with partial sun or shade, making it adaptable to various light conditions.

Growingconditions · propagation · uses
V

Cultivation

Japanese Horseradish thrives in full to partial sun, preferring moist, well-draining soil that can be light (sandy), medium, or heavy (clay). It is hardy in zones 7-10, making it suitable for temperate regions. Keep the soil consistently wet, and ensure the plant has ample water. The perennial grows to a height of 0.3 meters and can be propagated through division. Harvest the leaves and roots for culinary use.
Light
Full sun, Partial sun/shade
Water
Wet, Water
Soil
Light (sandy), Medium, Heavy (clay)
Hardiness
7-10
Life cycle
Perennial
Mature size
0.3 m tall
For first-time growers

How to grow Japanese Horseradish for the first time

8steps

Start with a simple, small-scale planting to get familiar with Japanese Horseradish.

  1. 1

    What you'll need

    Seeds or young plants, containers or garden space, potting mix suitable for light and heavy soils.

  2. 2

    Best time to plant

    Plant in spring after the last frost, when temperatures are mild.

  3. 3

    Soil and container prep

    Ensure soil is well-draining but moisture-retentive. Use containers at least 30 cm deep for roots.

  4. 4

    Sowing or transplanting

    Direct sow seeds in the ground or start them indoors, then transplant outdoors once established.

  5. 5

    First two weeks

    Keep soil consistently moist and provide partial shade to avoid stress from direct sun.

  6. 6

    Ongoing care

    Water regularly, especially during dry spells. Provide light to partial shade depending on the season.

  7. 7

    Harvest or pruning

    Prune leaves as needed for maintenance; harvest roots after 1-2 years when they are mature.

  8. 8

    Common mistakes

    Overwatering, planting in full sun, neglecting to provide enough shade, using poor soil drainage.

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Edible & utility

Edible parts:LeavesRoot
Edible uses: Condiment
Contextrange · companions · related
VII

Distribution

3 native · 1 introduced
Distribution across1 continent· 3 native· 1 introduced
Asia3 regions
native (2)JapanSouth Korea
introduced (1)Taiwan
Broader regions
native:Sakhalin
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Specimen gallery

1 image
Wasabia japonica (Japanese Horseradish) — botanical photograph
Japanese Horseradish (Wasabia japonica)
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Explore further

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