Mentha pulegium is a perennial found in areas such as Centraland southern Europe, including Britain, Mediterranean region, Macaronesia. A member of the Labiatae family, Mentha pulegium L is also known by its common name of Pennyroyal. The perennial can grow to a height of 0.4 meters and up to 0.6 meters wide. The preferred habitat of Moist meadows and sandy soils by streams etc[9, 17]., with LMH soil and SN moisture levels. .

Pennyroyal is a zone 7 hardy plant that has medicinal uses - the medicinal usage rating of Pennyroyal is 3Pennyroyal has been used for centuries in herbal medicine. Its main value is as a digestive tonic where it increases the secretion of digestive juices and relieves flatulence and colic[254]. Pennyroyal also powerfully stimulates the uterine muscles and encourages menstruation, thus it should not be prescribed for pregnant women since it can procure abortions, this is especially the case if the essential oil is used[238, 254]. The herb is antiseptic, antispasmodic, carminative, diaphoretic, emmenagogue, sedative and stimulant[4, 9, 46, 165]. A tea made from the leaves has traditionally been used in the treatment of fevers, headaches, minor respiratory infections, digestive disorders, menstrual complaints and various minor ailments[222, 238, 254]. It is occasionally used as a treatment for intestinal worms[254]. Externally, an infusion is used to treat itchiness and formication, inflamed skin disorders such as eczema and rheumatic conditions such as gout[254]. The leaves are harvested in the summer as . The plant comes into flower and are dried for
later use[4]. The essential oil in the leaves is antiseptic, though it is toxic in large doses[222].

Mentha pulegium is 1 plant, whose flowers bloom typically in 8 - 10, and which is pollinated by Bees.

Known hazards of the plant: In large quantities this plant, especially in the form of the extracted essential oil, can cause abortions so it should not be used by pregnant women[165].

The plant has an edibility rating of 3Leaves - raw or cooked[2, 9, 27]. Used as a flavouring in salads or cooked foods[183]. A spearmint-like flavour, though rather coarser, it is not used very often in Britain[4]. A herb tea is made from the fresh or dried leaves[183]. For drying, it should be harvested as . The plant comes into flower[4].

Cultivation tips: Succeeds in most soils and situations so long as the soil is not too dry[200]. Plants are very quickly diminished by dry conditions[4]. The plant prefers a stiff moist soil that is slightly acid[16, 27, 37, 200]. A sunny position is best for production of essential oils, but plants succeed in partial shade. Pennyroyal is often grown in the herb garden and is also cultivated commercially as a medicinal plant[4, 115]. There are two main forms of this species. One has weak prostrate stems and spreads by rooting where the stems touch the ground, it is only 10 centimeters tall[4]. The other is erect, does not spread so freely and grows about 30 centimeters tall, thus making it easier to harvest[4]. There is also at least one named form, called 'Dwarf' it is only a few centimetres tall[183]. The whole plant a strong spearmint smell. The flowers are very attractive to bees and butterflies[24]. A good companion plant for cabbages and tomatoes[20], helping to repel cabbage root fly and other burrowing insects[201]. Members of this genus are rarely if ever troubled by browsing deer[233].

. The plant should best be propagated by Seed - sow spring in a cold frame. Germination is usually fairly quick. Prick out the seedlings into individual pots when they are large enough to handle and plant them out in the summer. Mentha species are very prone to hybridisation and so the seed cannot be relied on to breed true. Even without hybridisation, seedlings will not be uniform and so the content of medicinal oils etc will vary. When growing plants with a particular aroma it is best to propagate them by division[K]. Division can be easily carried out at almost any time of the year, though it is probably best done in the spring or autumn to allow . The plant to establish more quickly. Virtually any part of the root is capable of growing into a new plant. Larger divisions can be planted out direct into their permanent positions. However, for maximum increase it is possible to divide the roots up into sections no more than 3 centimeters long and pot these up in light shade in a cold frame. They will quickly become established and can be planted out in the summer.

Leaves - raw or cooked[2, 9, 27]. Used as a flavouring in salads or cooked foods[183]. A spearmint-like flavour, though rather coarser, it is not used very often in Britain[4]. A herb tea is made from the fresh or dried leaves[183]. For drying, it should be harvested as . The plant comes into flower[4].