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common name: Chinese Motherwort, Yi-mu-cao, Honeyweed, Marihuanilla
synonyms: Leonurus artemisia
full sun, part shade
moist soil, sandy soil
preferred soil pH: any
minimum temp: -29°C
USDA zone: 5 to 9
Biennial, sometimes perennial or may be grown as an annual. Tall erect, upwardly branched stems, which are grooved and squarish in section, carry dull greyish green, sharply lobed leaves, up to 10cm long. Whorled spikes of small tubular white flowers with red or pink tips in late summer and early autumn. Foliage turns red in autumn.
Most well drained soils in a sunny position. Thrives on poor soils and drought resistant. Will normally flower in its first year.
From seed. Often self seeds in suitable conditions. Also from cuttings.
Tradition Chinese medicinal herb. Used for the treatment of constipation, boils, menstrual problems, snake and insect bites. The seeds have been used as an aphrodisiac.
The dried leaves and flowers are sometimes used for smoking as a herbal tobacco and is reputed to have a mild narcotic effect.
From North East Asia and Japan.
There is some confusion between this and very species from warmer areas, Lenurus japonicus and Leonurus heterophyllus.