How to Grow Horseradish
Armoracia rusticana
Horseradish is a vigorous perennial root vegetable prized for its pungent flavor used in condiments. Gardeners grow it primarily to harvest large roots that develop deep underground over time.
📷 Wikipedia: HorseradishStarting Horseradish: indoors or direct sow?
🌾 Sow directly in the garden — Horseradish is not usually started indoors.
Horseradish is best started directly in the garden rather than indoors; if using divisions, plant them immediately after digging up established plants.
Soil, care & harvest
Prepare loose, fertile soil with a pH between 6.0 and 7.0 before planting. Since horseradish is a cool-season crop, sow seeds or plant divisions 2 to 6 weeks before the last spring frost. Press seeds gently into the soil at a depth of about one inch; they typically germinate within two to three weeks under cool conditions.
Space plants 18 to 24 inches apart to allow roots room to expand without crowding. Water moderately to keep soil consistently moist but not waterlogged, especially during root formation. Apply a layer of mulch around the base to retain moisture and suppress weeds, feeding lightly with balanced fertilizer if growth seems sluggish.
This hardy plant generally escapes serious pest or disease issues due to its strong chemical defenses. To harvest, wait until roots are pencil-thick, usually taking one growing season for direct sown seeds or a few months for divisions. Dig carefully around the root mass and lift gently to avoid damaging the thick taproot.
