Horseradish is often grown as an annual but it is really a perennial plant. Full sun preferred. The main harvest is in autumn although side roots can be snipped off in summer for immediate use. Horseradish sauce is made from the root of the plant. The heat and pungency are not apparent until the root is grated. The leaves, which are milder tasting, can be added to salads.
Medicinal uses: If small amounts are eaten regularly it is said to ward off colds as horseradish contains high amounts of vitamin C and many essential minerals.