Even though you dig up the plant to harvest the roots each year, new plants can (and will) return in the spring from any small pieces of root still in the ground. It is so prolific, it can get out of control if you are not careful, a good reason to grow it in pots!
Though horseradish is used sparingly due to its strong hot flavor, it does add some nutritional benefits to your food. Lots of vitamin C, potassium, calcium and magnesium to name a few. When ground, the root produces isothiocyanates, chemical compounds that are studied for their anti-cancer properties.
It's leaves are fabulous as peppery salad greens too, but the true value of this plant is in the wonderful horseradish root sauce that you can produce. The roots are chopped, grated or minced, and usually mixed with vinegar, bottled and then used as a condiment. The stuff you buy in the store doesn't even compare! Makes the best horseradish crusted salmon!
How to get started
When to plant horseradish
The longer you store your horseradish roots, the less flavorful they will be. That goes for prepared horseradish as well.