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Garden Tips from The Micro Farm Project: How to Grow Horseradish

Updated on August 23, 2017

Roots of the Root

The aromatic roots of the horseradish plant have been prized for their medicinal and culinary properties for 3,000 years. According to Greek mythology, the Delphic Oracle described horseradish to Apollo, the God of medicine, as "worth its weight in gold." From ancient Egypt to mysterious Pompeii, early civilizations depicted horseradish in their art and writings. Used for thousands of years, horseradish is also counted amongst the five bitter herbs used in the Jewish celebration of the Passover Seder.

During the Middle Ages, both the leaves and roots were used as medicinal remedies, and its culinary value as condiment on meats was taking shape in Germany, Scandinavia and finally, Britain. Horseradish crossed the Atlantic Ocean to North America during colonial times.

Today, horseradish is grown, eaten and used medicinally all over the world. A cold-hardy perennial, it is most often grown for its aromatic roots, which have been known to grow up to two-feet long. The leaves are edible, as well. Notice in the photo how much the leaves resemble arugula, also known by its more lively name, "Salad Rocket." Like horseradish, rocket is a member of the mustard family, which also includes watercress, broccoli, cabbage, kale and a number of other common garden veggies.

Photo credit: Jengod's photostream at Flickr.com

Horseradish can easily get out of control in the garden as it spreads prolifically. For this reason, it is often grown in containers. This article will show you how to grow it in your own backyard, including instructions for preparing and preserving horseradish, and a delightful recipe for radish relish.

How to Plant Horseradish
How to Plant Horseradish

Planting Horseradish

Site preparation: Plant horseradish in full sun. It will tolerate partial shade, but prefers a very sunny location. Soil should be rich, loose and well-drained. Prepare the soil to a depth of 18 inches, removing any stones or obstacles that might cause the root to become gnarled or split. Add plenty of compost to the planting bed to keep the soil loose so that roots can grow freely. Horseradish grows best in a soil pH of 5.5 to 6.8.

When to plant: Plant crowns, seeds or root cuttings 4 to 6 weeks before the average last frost date in your region.

Planting and spacing: Horseradish is most often grown from crowns or root cuttings. There are several techniques for planting horseradish. 1. Set crowns just at soil level. 2. Plant small roots in shallow trenches, and cover with 2 to 3 inches of soil. 3. Plant root cuttings on a 45 degree angle with the narrow end down; fill the trench until the wide end of the root is just covered.

Space cuttings 2 to 3 feet apart. If planting rows, space them 18 inches apart.

To grow from seed, prepare the bed, as described above. Dig a furrow 3-5 inches in depth. Sow seeds in the furrow, and cover with loose soil or compost. When seedlings begin to appear, thin them to 1 foot apart. When they are 4 inches tall, thin them again to 2-3 feet apart.

To contain horseradish in the garden, set borders 2 feet deep around the plants to prevent it from spreading.

Container growing: Choose a container that is a minimum of 3 feet deep so allow the roots to grow freely

Where to Buy Horseradish

Amazon carries a small selection of horseradish plants, roots and seeds. I like to stock up on garden supplies, purchasing all of the seeds, cuttings and supplies that I will need for my garden at one time in order to take advantage of FREE Super Saver shipping on qualified orders of $25 or more.

A search online for horseradish roots will yield a number of options for purchasing quality starts for your garden. Horseradish can also be grown from roots purchased at the grocery store. Be certain to buy only organic horseradish that has not been treated with chemicals that inhibit sprouting.

Photo credit:: pixabay.com
Photo credit:: pixabay.com

Horseradish Cultivation

Water and feeding: Water on a regular schedule, keeping the soil evenly moist to prevent roots from drying out and becoming fibrous. Soil should feel as moist as a wrung-out sponge, not waterlogged. Add compost or a low nitrogen fertilizer to the planting bed monthly.

Companion plants: Horseradish grows well with potatoes and yams.

Cultivation Practices: Encourage the growth of a large taproot root by pruning away side roots. Use a spade to slice down around the plant at a circumference of 4 inches to sever side roots. Carefully dig out the cut roots (you can eat them.) Another tip is to remove all but the center bunch of leaves from the top of the plant, pinching off any suckers as they begin to grow on the sides.

Pests and Diseases: Horseradish has no serious pest or disease problems.

Horseradish Roots
Horseradish Roots

When and How to Harvest Horseradish

Harvest 140 to 160 days after planting. You can begin to cut small sections of side roots as needed when the leafy portion of the plant is about a foot tall. Horseradish grows best in late summer into the fall, so leave the main root to grow until the first frost.

Although horseradish is a perennial plant, it tastes best in the first year, and the roots become tough and woody in subsequent years. Harvest fully, removing all of the roots, in mid-autumn, at first frost. In cold climates, be sure to harvest before the ground freezes. You can save a cutting and replant it in order to grow a brand new horseradish plant for the next season.

Photo credit: marcu ioachim at photocommunity.com.

Storing and Preserving Horseradish

Chopped or grated horseradish stores in the refrigerator for up to 2 weeks. Whole roots can be washed and stored in the fridge in a perforated plastic bag for up to 3 months. To freeze horseradish, grate the roots and soak them in a mixture of 50% water and 50% white vinegar. Drain and pack in zipper bags.

To store in a cold cellar, bury the roots in sawdust for winter storage.

Photo credit:  andhong09 on Flickr
Photo credit: andhong09 on Flickr

A little of this sauce goes a long way! Use as a sandwich spread, a dip or a topping for meat dishes. But beware...it is spicy! If you prefer a creamier sauce, stir in sour cream and Dijon mustard.

Store the sauce, covered, in the fridge. Without sour cream, it will last for several weeks. With sour cream, it will last about a week, so I recommend adding the cream only as needed, just prior to use.

To freeze the sauce, omit the sour cream and mustard. Freeze serving-sized portions in an ice cube tray. Once frozen, pop cubes out of the tray and store in a zipper freezer bag. To serve, thaw completely and add the sour cream and mustard, if desired.

  • Prep time: 10 min
  • Ready in: 10 min
  • Yields: 1 1/2 cups of sauce

Ingredients

  • 1 1/2 cup of peeled and cubed horseradish root
  • 1 cup white vinegar
  • 2 1/2 tsp white sugar
  • 1/2 tsp kosher salt
  • 1 cup sour cream (optional)
  • 1 tbsp Dijon mustard (optional)

Instructions

  1. Process all four ingredients in a food processor or blender. When you remove the lid, keep your face away from the container as the fumes may burn your eyes and nose. Cover and store the sauce in the refrigerator.
  2. For a creamier sauce, add sour cream and Dijon mustard to the sauce. Stir well. Cover and store in the refrigerator.
Cast your vote for Horseradish Sauce Recipe
Horseradish can clear nasal congestions.
Horseradish can clear nasal congestions.

Herbal and Medicinal Uses for Horseradish

Horseradish contains several essential nutrients, including potassium, calcium, magnesium, and phosphorus. In its raw state, horseradish boasts approximately 79.31 milligrams of vitamin C per 100 grams. Mustard oil is also present, which gives horseradish its antibacterial properties. Roots have been used to treat many conditions, including urinary tract infections, coughs and bronchitis, congestion, and even hangnails and ingrown toenails. Additionally, compounds present in the roots have been shown to kill some bacterial strains.

Anyone who has every breathed or swallowed horseradish without knowing what it was in advance can attest to its sinus-clearing capacity. A spoonful of grated horseradish mixed with honey is a common recommendation for naturally clearing nasal congestion in a flash. Eating horseradish regularly reportedly boots immunity to not only heal, but also prevent coughs, colds and flu.

For more remedies, visit Natural Cough, Cold and Flu Remedies

Red radishes give the relish bite and color.
Red radishes give the relish bite and color.

Bright and Cheerful Radish Relish Recipe

Horseradish is a healthy addition to the diet, but it can be challenging to find ways to incorporate it into everyday meals. This versatile recipe can help. Not only does it include aromatic horseradish, but also healthy veggies,onions and garlic. The colorful relish is very pretty on the table, and inviting to see and smell. It has a pungent flavor that adds depth to all sorts of dishes, from red meat to fish, rice dishes, casseroles and even as a sandwich spread. Basic grilled cheese or ham and cheese sandwiches take on a whole new essence with the addition of radish relish. It is simple to make and store beautifully in the fridge for many months.

Ingredients

  • 3 cups stemmed red radishes
  • 2 large celery sticks
  • 1 large red onion
  • 2 tsp kosher or pickling salt
  • 1 cup raw sugar
  • 1 tbls mustard seed
  • 2 tsp dill seed
  • 1/2 tsp celery seed
  • 1 cup apple cider vinegar
  • 2 tbls prepared horseradish or 1 tbls fresh grated horseradish
  • 1 large garlic clove

Instructions

  1. Finely chop radishes, celery, garlic and onion by hand or with a food processor. Place them in a bowl and add all of the remaining ingredients. Cover and allow the mixture to stand for 3-4 hours.
  2. Transfer the mixture to a non-reactive saucepan and bring to a boil. Reduce heat to simmer for 10-15 minutes, until the liquid begins to reduce. Allow the mixture to cool. Pour into mason jars and refrigerate.
  3. To hot pack the jars for pantry storage, do not allow the mixture to cool before canning. Pour into hot, sterilized jars, leaving a half-inch head space. Adjust lids and process 1/2 pints or pints in a boiling water bath for 20 minutes.
  4. For more detailed canning instructions, click here. The article concerns canning tomatoes, but the principals apply to water bath canning of other food items, as well.
  5. Photo credit: momsrecipesandmore.blogspot.com

Is Horseradish Part of Your Diet?

Some folks love the flavor and aroma of horseradish, and are thrilled by its sinus-clearing power. Others are turned off by its overpowering pungency.

What about you? Do you like horseradish, or hate it?

Post your comments or questions about horseradish here. Got a tip? Share it! Feel free to post any relevant links. Kindly link back to this lens if posting links to your own lenses or webpages.

Comments or Questions about Horseradish?

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      anonymous 4 years ago

      Hi Kari,

      I featured this post on The HomeAcre Hop today :) Hope you'll stop by to share more wisdom today!

    • profile image

      anonymous 4 years ago

      I love horseradish, but have never grown it or made the sauce from scratch. I had no idea it was so good for you! Thank you for sharing this post with the Hearth and Soul hop.

    • profile image

      anonymous 4 years ago

      We enjoy the pungent flavor of horseradish, especially horseradish sauce on a tenderloin roast or a sandwich. Thanks for sharing on Hearth & Soul Hop. :)