Black Horehound

Ballota nigra

Physical Characteristics

Ballota nigra is a PERENNIAL growing to 0.9 m (3ft) by 0.8 m (2ft 7in). See above for USDA hardiness. It is hardy to UK zone 8 and is not frost tender. It is in flower from June to October. The species is hermaphrodite (has both male and female organs) and is pollinated by Bees. Suitable for: light (sandy), medium (loamy) and heavy (clay) soils, prefers well-drained soil and can grow in nutritionally poor soil. Suitable pH: mildly acid, neutral and basic (mildly alkaline) soils. It can grow in full shade (deep woodland) semi-shade (light woodland) or no shade. It prefers moist soil.

Distribution

Most of Europe, including Britain, south and east from Scandanavia to N. Africa and E. Mediterranean

Habitats

Woodland Garden Dappled Shade; Shady Edge;

Edible Uses

None known

Medicinal Uses

Antianxiety Antiemetic Antispasmodic Stimulant Vermifuge Black horehound has a long history of herbal use, though is not widely employed in modern herbalism because of its unpleasant flavour[238, 268]. Nonetheless, it does have a range of medicinal virtues, being especially effective in its action as an antiemetic[254]. In the past it was often used for treating problems connected with the respiratory system, convulsions, low spirits and the menopause, but present-day authorities differ over whether it was effective in these applications[254]. The whole plant is antiemetic, antispasmodic, expectorant, stimulant and vermifuge[4, 165, 238]. It is taken internally in the treatment of nervous dyspepsia, travelling sickness, morning sickness in pregnancy, arthritis, gout, menstrual disorders and bronchial complaints[238, 254]. The plant is harvested as it comes into flower and is dried for later use[238]. It should not be stored for longer than a year[238]. The fresh herb is sometimes used to make a syrup[238].

Known Hazards

None known