Horseradish (Armoracia rusticana) is a clump-forming perennial plant in the Brassicaceae family. It is grown from root divisions and can be extremely aggressive. If you worry about horseradish spreading and taking over your garden, you can plant it within barriers—or you can grow it in a container, where you have the option of growing it as an annual plant with a single large root.
Horseradish is normally planted in spring from root segments or sometimes potted nursery plants. It will quickly grow and be ready to harvest by fall.
| Botanical Name | Armoracia rusticana |
| Common Name | Horseradish, red cole, German mustard |
| Plant Type | Perennial herb |
| Mature Size | 12 to 18 inches tall; 15- to 18- inch spread |
| Exposure | Full sun to part sun |
| Soil Type | Loose, rich soil |
| Soil pH | Neutral (6.0 to 7.5) |
| Hardiness Zones | 3 to 9 (USDA) |
| Native Area | Central Europe |