5 Companion Plants for Horseradish (With Pictures)

Horseradish may possibly be an acquired style, but it packs lots of stunning positive aspects behind its sharp flavor and powerful aroma.

The distinctive compounds that give us the tangy flavor of horseradish sauces boast a host of cancer-preventing, antioxidant, and antibiotic qualities. In the yard, these exact same compounds fight soil-borne pathogens and herbivorous bugs.

As a minimal-maintenance plant, horseradish provides an straightforward-going and seemingly automatic pest prevention approach. But as any individual who’s at any time had a colossal aiding of wasabi will explain to you, there is this sort of a issue as as well significantly of this spicy perennial.

Horseradish can rapidly turn out to be invasive if it grows unchecked, and its pest-repellent qualities grow to be much considerably less useful among particular greens. When you plant horseradish in the incorrect place, you could create a lot more operate than it’s really worth. Get the most from including horseradish to your backyard with this appear at suitable companion planting.

Why Is Horseradish a Excellent Companion Plant?

Like a lot of other cruciferous plants, horseradish consists of secondary metabolites named glucosinolates (GSLs). In horseradish, the main GSL is sinigrin. When horseradish cells experience harm, an enzyme in the plant known as myrosinase mixes with and hydrolyzes the sinigrin, generating allyl isothiocyanate (AITC), or “mustard oil.”

AITC gives horseradish its powerful aroma and flavor along with its most cancers-preventing benefits. At the meal table, you only release AITC right after grating, mashing, or in any other case destroying refreshing horseradish roots.

In mother nature, AITC is the major element of horseradish’s antibacterial, antifungal, and pest-preventative qualities. If a bug or fungus consumes element of the plant, it will crack the obstacles that individual the sinigrin from the myrosinase. Like a molotov cocktail, the two blend to produce AITC, possibly killing the pest or driving it absent.

Agricultural professionals worth the electricity of AITC in eco-helpful biofumigation. Numerous industries use synthetic AITC in built-in methods for managing pests, fungi, micro organism, nematodes, and other threats.

The repellent characteristics of GSLs and AITC can be potent enough to ward off attackers all around nearby plants. But though other Brassica veggies, including broccoli and Brussels sprouts, also contain these compounds, horseradish separates itself as a beneficial companion plant by way of its extremely high AITC ranges. For comparison, horseradish materials an AITC focus of 1,350 mg/kg, while cabbage only is made up of 3 mg/kg.

Outside the house of certain mustard vegetation, horseradish is your ideal wager for recognizing the advantages of GSL and AITC via planting. If you are seeking for the greatest spot to start off, try pairing it with these practical companion crops.

The five Great Companion Crops for Horseradish

one. Potatoes

newly harvested potatoes
Graphic Credit: Jai79, Pixabay
USDA Hardiness Region: 3–10
Sunshine: Full/partial
Soil: Loose, well-drained

Horseradish can aid other underground growers like potatoes and sweet potatoes by fortifying the soil from disease and protecting against common pests. A properly-placed plant may possibly ward off bugs like Colorado potato beetles, whiteflies, blister beetles, weevils, and certain aphids.

Most authorities recommend planting horseradish at the corners of a potato patch to develop a defensive barrier that won’t intermingle with your potatoes. Horseradish grows vigorously by means of underground shoots and will quickly encroach on potatoes if left untended, creating several complications.

When it grows as well shut to its companion vegetation, horseradish can lend its spicy, peppery flavor, which many individuals won’t enjoy. Because you have to dig potatoes, you could also hit overlapping horseradish roots. If you split them off and perform them into the soil, there could be new, unintended horseradish crops growing in the patch next calendar year.

2. Rhubarb

rhubarb planted in soil outdoors
Image Credit: kaori nohara, Unsplash
USDA Hardiness Area: 3–8
Sunlight: Complete
Soil: Abundant, effectively-drained

Rhubarb and horseradish are mutually beneficial in the yard. Although horseradish can serve as a regenerative sacrifice plant for slugs, rhubarb can support repel several Brassica pests. Leaves incorporate higher quantities of oxalic acid, a toxic substance to folks, animals, and insects. Planting rhubarb might manage flea beetles on your horseradish, and you can even use the leaves in a Diy insecticidal spray for the backyard garden.

As with any companion plant, you should different rhubarb and horseradish to stop the latter from overtaking the mattress. An efficient alternative to avoid out-of-handle root expansion is to plant the horseradish in an open up-finished bucket set into the ground. The roots will even now be capable to expand into the soil, but the bucket walls will hold the shoots from extending laterally.

three. Strawberries

Picture Credit history: oli2020, Pixabay
USDA Hardiness Region: 4–9
Sun: Full
Soil: Wealthy, sandy, nicely-drained

It’s hard not to think of strawberries when you feel of rhubarb, so why not increase them jointly? With horseradish increasing nearby, strawberries will take pleasure in the very same pest-protecting against positive aspects to support them take care of slugs, weevils, and even bigger rodents that attempt to steal the juicy fruit. When left to flower in the summer season, horseradish may possibly even assist draw in crucial pollinators to support late-developing strawberries arise in abundance.

four. Fruit Trees

harvesting apples
Picture Credit: lumix2004, Pixabay
USDA Hardiness Area: 2–11
Sunlight: Total
Soil: Loamy, effectively-drained

Horseradish tends to pair well with most fruit trees, which means you can just take advantage of it no matter your zone. Develop horseradish up to zone 3 with apple and cherry trees or down to zone eight to accompany citrus and peach trees. Planting it at the foundation of your trees will preserve away little beetles, weevils, and other bugs, even though also halting rats, mice, moles, and some birds from acquiring cozy in the orchard.

Fruit trees also benefit from close by horseradish companions due to the fact of their fungicidal characteristics. Outside the house of well prepared relishes and sauces, you can use harvested horseradish in organic and natural sprays to stop apple scab and bacterial bacterial infections.

5. Grapes

grape touched by sunlight
Picture Credit history: Optimusius1, Pixabay
USDA Hardiness Area: 4–10
Sun: Entire
Soil: Rich, effectively-drained, clay/sandy

Grapes are a flavorful basis for homemade jams and juices that deliver splendor to the backyard, specifically when they have a chance to thrive on an arbor or trellis. Like tree fruit, grapes may possibly fall sufferer to a variety of pests and rodents. As a companion plant, horseradish can stem the onslaught of would-be attackers. At the identical time, it can tolerate the partial shade designed by an upward-increasing vine.

The Worst Companion Crops for Horseradish

A broad assortment of vegetables will engage in welcoming with horseradish, but there are circumstances where it can be a nuisance. Horseradish is an intense grower, so it requirements to stay in check throughout the increasing time and even soon after harvest. It propagates easily from small root cuttings and will most likely re-emerge if you till it into the soil.

As it spreads, horseradish can impose itself on neighboring garden veggies. Leafy greens and beans can simply consider on a peppery taste, and horseradish will compete for root room with a lot of vegetation.

cabbage field
Impression Credit rating: silviarita, Pixabay

Horseradish and Other Mustard Plants

Brassica crops like broccoli, cabbage, bok choy, and kale are bad companion vegetation for horseradish. As portion of the loved ones, horseradish shares attributes with these veggies, such as the advancement of GSLs and their byproducts. Even though GSLs and AITC can repel and hurt generalist bugs, numerous expert pests and fungi have no difficulty attacking horseradish and its loved ones associates.

Curiously, numerous of these expert bugs, like cabbage aphids and horseradish flea beetles, sequester GSLs as they take in crops to make “mustard oil bombs,” a lot like the horseradish vegetation they infest. By producing GSL byproducts like isothiocyanates, these pests can ward off predator bugs, generating your pest prevention efforts more difficult.

To preserve horseradish from bringing unwelcome pests about your other Brassica veggies and vice versa, individual them in the backyard garden and very carefully prepare your crop rotations. Must your broccoli develop root rot one 12 months, your horseradish could select it up the next time if it will take more than the region. Rotate horseradish so that it only appears in a previous mustard plant plot as soon as each 3–5 several years.


Horseradish can develop with practically zero upkeep, and with all of its rewards for companion plants and your overall health, there is no purpose to go away it out of the backyard garden this 12 months. In most cases, the only risk is that your crop might be as well profitable, which is simple sufficient to keep away from with careful planning. Include horseradish close to these companion crops as an natural and organic strategy to maintain your yard pest-free and flourishing.


Showcased Impression Credit score: kungfunamhuynhdao, Pixabay