140 to 160 days
Loosen the soil to 12 inches deep and add a shovelful of compost. Plant the root cutting at a 45-degree angle, with the top of the cutting 2 inches below the soil line. One plant is usually plenty for a family. If you love horseradish so much that you need more than one plant, space them 30 inches apart.
A few horseradish facts:
It is a perennial (meaning if you plant it once, it will grow back every year). It is generally regarded as a tenacious perennial, meaning that it can be difficult to extricate once planted in the garden.
Grow new horseradish plants with pieces of root that are about the diameter of a finger and 12 to 18 inches long. It will quickly spread, so you won’t need more than one or two plants to feed the whole family.
When planting horseradish in pots, choose a pot that has drainage holes and is deep enough to encourage root growth (24-36 inches deep). Although horseradish is cold hardy, plant your container grown root after all danger of frost has passed or start it indoors.
The best time to harvest horseradish is when the plants are dormant. This can be done in the early spring just as the crown is showing green or in fall after a killing frost. Always wear gloves when working with horseradish because the roots can cause skin irritation.
Some plants don’t like aromatic herbs and although horseradish is not the most aromatic of herbs, they still have pungent roots. Poor companion plants are things like beans and watery/leafy vegetables, such as cucumber, lettuce, and celery. Definitely avoid planting with these vegetables.
There is nothing more, really, to horseradish than the leaf and the root, and both are edible. Technically, though they are not commonly eaten, the leaves are edible both when young and when old. … The older leaves become bitter and work better when cooked as one would collards or mustard greens.
Theoretically horseradish may lower blood pressure and should be used with caution if you have low blood pressure or are taking medications that can lower blood pressure. Horseradish may also affect thyroid hormone levels in the blood.
Because the plant is being grown for its root, there is no need to cut horseradish flowers, unless, of course, you wish to use them for indoor flower arrangements – although the flowers are not showy. If your horseradish plant has flowers, it may even be of some benefit to leave the blossoms alone.
Cool soil promotes the formation of compounds that give horseradish roots their pungency, so it’s best to harvest horseradish in fall, winter, and early spring. I’m ready to dig a plant or two by early October, mostly to have the warming effects of horseradish on the autumn table.
But each autumn, even after deer browse the horseradish leaves to stalks, I harvest and process enough horseradish to meet my family’s needs. Harvest time comes after a couple of good hard frosts, which help sweeten horseradish roots, but before the ground freezes. … The root will likely snap off, but that’s okay.
You can eat horseradish raw, pickled or cooked, but it is most often added as a condiment to sauces. Horseradish is at its strongest and most biting when it is freshly grated.