Planting Guide and Seed Saving Notes for Horseradish
Horseradish (Armoracia rusticana)
A perennial, cold hardy crop, horseradish is easy to grow in sun or partial shade, and quickly makes itself at home in gardens. Set out roots a few weeks before your last frost date, in any fertile, well drained soil.
How to Grow Horseradish from Rhizome
Horseradish grows in moist, silty soils. Space plants 30" apart. Site your horseradish in an out-of-the way spot., because it's hard to move this perennial once its planted.
Situate horseradish roots diagonally in the soil, with the slanted end down and the flat end up.
Allow upright horseradish plants a full season to establish themselves in the garden. The long, strap-like leaves often grow 3 to 4 feet tall; the should not be fed to livestock or people, but make good compost fodder.