Horseradish Seeds for Planting - Armoracia rusticana

Though the product offers seeds, note that horseradish is most reliably grown from root “sets” or cuttings; seeds often take longer and may not reliably reproduce true-to-type.
Sow seeds (or root sets) directly outdoors when soil is workable (early spring or late winter) in a deep, well-prepared bed.
Prepare soil by digging deeply (8–10 inches / 20–25 cm) and removing stones; soil should be fertile and loosened.
If using seeds: sow thinly and transplant/ thin seedlings when big enough to give around 35–50 cm space per plant.
If using root sets (recommended): plant cuttings 2–3 inches (5–7 cm) deep (or at slight angle), flat-cut end up.

Because horseradish spreads aggressively, grow it in a dedicated bed or large container to prevent it spreading unchecked.
For best root quality, weed thoroughly and mulch to keep soil cool and moist.
If you plant via root cuttings, leave one or two shoots initially to allow the main root to focus on development, then remove excess sprouts for larger roots.
Avoid planting horseradish near other leafy vegetables that might get crowded — give it space due to its spreading root habit.