Horseradish is a hardy, long-lived perennial known for its pungent, flavourful roots and striking garden presence. Growing up to 1.5m (5ft) tall, horseradish features wide, single-ribbed leaves and produces pretty white flowers in summer, making it both functional and ornamental.

The fresh root is perfect for making horseradish sauce—simply peel and grate the root, then mix with vinegar, cream, and sea salt to taste for a tangy homemade condiment. For controlled growth, horseradish is best planted in a large pot sunk into the garden to prevent its long-extending roots from spreading.

Where Can You Grow Horseradish

Horseradish thrives in Zones 3-9 with rich, well-drained soil and full sun to partial shade. It grows well in garden beds, containers, or controlled spaces to manage its spreading nature.

History and Historical Uses

Native to Europe, horseradish has been cultivated for centuries for both culinary and medicinal purposes. Its sharp, tangy flavour made it a staple in traditional condiments, while its roots were used in remedies for respiratory and digestive health. Today, horseradish remains a popular addition to gardens and kitchens alike.

Canadian Zone Information

• Zones 8-9: Plant roots in early spring or autumn for strong growth.
• Zones 5-7: Plant in spring after the ground thaws or in early autumn for overwintering.
• Zones 3-4: Mulch heavily after planting to protect roots from freezing temperatures.
  
  
  

How to Grow and Harvest Horseradish

1. Planting: Plant roots vertically or at a slight angle, with the top 5-10cm (2-4in) below the soil surface. Use a large pot or sink a container into the garden for control.
2. Watering: Keep soil consistently moist but not waterlogged during the growing season.
3. Harvesting: Harvest roots in late autumn or early winter after the first frost, when their flavour is most intense. Dig carefully to avoid breaking long roots.
4. Replanting: Save a portion of the harvested root to propagate new plants the following year.

Seed Saving Tips for Future Supply

Horseradish is primarily propagated through root cuttings rather than seeds. However, if seed saving is desired:

1. Allow to Flower and Seed: Let plants flower in summer, producing seed pods after pollination.
2. Harvest Seeds: Once pods dry and turn brown, cut them from the plant and place them in a paper bag.
3. Dry and Clean: Allow pods to dry for 1-2 weeks, then crush to release seeds. Separate seeds from chaff.
4. Store: Store seeds in an airtight container in a cool, dark place. Properly stored seeds remain viable for up to 2 years.

Certified Organic By

Islands Organics Producers Association (Cert#1962)