Armoracia rusticana

Bloom Color: White.
Main Bloom Time: Early summer, Late spring, Mid spring.

Armoracia rusticana is a PERENNIAL growing to 0.7 m by 0.8 m at a fast rate.
It is hardy to zone 5 and is not frost tender. It is in flower from May to June. The species is hermaphrodite and is pollinated by Bees, flies, beetles. The plant is self-fertile.
Suitable for: light , medium and heavy soils and prefers well-drained soil. Suitable pH: acid, neutral and basic soils and can grow in very alkaline soils.
It can grow in semi-shade or no shade. It prefers moist soil.

Landscape Uses:Massing, Seashore. A very easily grown plant, horseradish prefers a good deep moist well-drained soil and a sunny position. Plants require a good soil if they are to produce good roots, though once established they are very tolerant of neglect and will continue to produce a crop for many years. Plants do not thrive if they are in the shade of trees. Excess nitrogen causes heavy top growth and forking of the roots. Prefers a wet clay soil according to one report, whilst another says that it will not grow in wet clay. Tolerates a pH in the range 5.8 to 8.3. Horseradish has long been cultivated for its root which is used as a food flavouring and medicinally, there are some named varieties. If the roots are given some protection they will produce fresh young leaves for the salad bowl all through the winter. Digging up some roots and putting them into a greenhouse for the winter is the easiest method. If the young shoots are blanched they will produce white, tender, sweet leaves. A very invasive plant, it is considered to be a pernicious weed in some areas. Even quite small sections of root will regrow if they are left in the soil. The plant has yet to prove invasive on our Cornwall trial grounds, though it has survived and even prospered in a very overgrown site. The forms of this plant grown in gardens are almost sterile and seldom produce good seed. This is a good companion plant for potatoes since it is said to deter potato eelworm and the Colorado beetle. One plant at each corner of the potato patch is quite sufficient. When grown under apple trees it is said to prevent brown rot, powdery mildew and other fungal diseases.Special Features:Fragrant foliage, Not North American native, Invasive, Naturalizing, Fragrant flowers. The plant is heat tolerant in zones 12 through 1. .
At this temperature, many plants begin to suffer physiological damage. Heat Zones range from 1 to 12 .
For example Heat Zone. 11-1 indicates that the plant is heat tolerant in zones 11 through 1.) For polyculture design as well as the above-ground architecture information on the habit and root pattern is also useful and given here if available. The plant growth habit is a runner spreading indefinitely by rhizomes or stolons . The root pattern is a tap root similar to a carrot going directly down .