Horseradish

Armoracia rusticana

vegetable

Horseradish is a tough, deep-rooted perennial grown for its thick taproot, which releases an intense, sinus-clearing pungency only when grated. A single planting establishes quickly and returns for years; the broad leaves are vigorous and the plant spreads readily.

✅ Plant alongside

Good neighbors that attract beneficial insects or deter pests

• Potato — Horseradish at the bed corners is traditionally said to improve potato health
• Rhubarb — A fellow long-lived perennial that shares an out-of-the-way bed
• Asparagus — Pairs in a permanent bed where neither needs yearly digging

🛡️ Pest & disease prevention

Proactive ways to stop trouble before it starts — tap a name with an arrow for its full guide

• Flea beetles →

  Float row cover over young leaves; established plants shrug off most damage

• Aphids →

  Hose off colonies and encourage ladybugs and lacewings

🌾 Harvest & storage

Dig roots in late fall after frost at the end of the first season - late October into November, just before the ground freezes - when the pungency peaks; roots left in the ground for a second growing season turn woody and stringy, so horseradish is best grown as an annual. Lift the main root and replant a side root or crown to continue the patch. Grate only what you need, since the heat fades fast once cut, and a splash of vinegar fixes the pungency.

🥗 Nutrition & benefits

Horseradish root is rich in pungent glucosinolates that release sinus-clearing oils, plus vitamin C. Note that it spreads aggressively, so contain the planting.