Practical
Plants

Mentha arvensis piperascens

Japanese Mint

a perennial member of the Mentha genus in the family Labiatae.

No photo available

Taxonomy and growth

Family
Labiatae
Genus
Mentha
Life cycle
perennial
Height
0.45 m
Spread
1 m
Fertility
Bees
Flower type
hermaphrodite
Pollinators
Bees

Uses

Toxicity

Toxicity warning. The historical record reports a hazard for this plant. Do not use it to decide which parts are safe to eat or use medicinally.

This section contains historical Plants For A Future notes marked noncommercial.

Although no records of toxicity have been seen for this species, large quantities of some members of this genus, especially when taken in the form of the extracted essential oil, can cause abortions so some caution is advised.

Edible uses

This section contains historical Plants For A Future notes marked noncommercial.

Leaves - raw or cooked. Used as a flavouring in salads or cooked foods[20][4][6], they have a strong taste of peppermint[13]. A herb tea is made from the fresh or dried leaves[9][6]. An essential oil from the plant is used as a flavouring in sweets and beverages[6]. The leaves contain about 0.2% essential oil[10].

Product or use
Condiment
Product or use
Tea
Plant part
Leaves

Medicinal uses

Historical medicinal uses. These records describe reported uses. They do not establish safety or effectiveness. Ask a qualified health professional before using any plant medicinally.

This section contains historical Plants For A Future notes marked noncommercial.

Japanese mint, like many other members of this genus, is often used as a domestic herbal remedy, being valued especially for its essential oil[19] which has antiseptic properties and a beneficial effect on the digestion. Like other members of the genus, it is best not used by pregnant women because large doses can cause an abortion. The whole plant is anaesthetic, antiphlogistic, antispasmodic, antiseptic, aromatic, carminative, diaphoretic, emmenagogue, galactofuge, refrigerant, stimulant, stomachic and vasodilator[2][4][10][19]. A tea made from the leaves has traditionally been used in the treatment of fevers, headaches, digestive disorders and various minor ailments[11][19]. The leaves are a classical remedy for stomach cancer[10]. The essential oil in the leaves is antiseptic, though it is toxic in large doses[11].

Product or use
Anaesthetic
Product or use
Antiphlogistic
Product or use
Antiseptic
Product or use
Antispasmodic
Product or use
Aromatic
Product or use
Cancer
Product or use
Carminative
Product or use
Diaphoretic
Product or use
Emmenagogue
Product or use
Febrifuge
Product or use
Galactofuge
Product or use
Salve
Product or use
Stimulant
Product or use
Stomachic

Material uses

This section contains historical Plants For A Future notes marked noncommercial.

The plant is used as an insect repellent[5][7][21]. Rats and mice intensely dislike the smell of mint. The plant was therefore used in homes as a strewing herb and has also been spread in granaries to keep the rodents off the grain[16]. An essential oil is obtained from the plant[13]. It can be used as a substitute for, or adulterant of, peppermint oil[13]. Yields of up to 1.6% have been obtained[15].

Product or use
Essential
Product or use
Repellent
Product or use
Strewing

Environment

Range
E. Asia - China, Japan and Korea.
Habitat
Wet grasslands near rivers and lakes at elevations of 200 - 1100 metres in China[18].
Light
full sun
Shade tolerance
light shade
Water
moderate
Hardiness
Zone 4+
Soil textures
sandy, loamy, clay, heavy clay
Soil pH
acid, neutral, alkaline
Tolerates Nutritionally Poor Soil
No
Drought
intolerant

Propagation

This section contains historical Plants For A Future notes marked noncommercial.

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 3cm 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.

Cultivation

This section contains historical Plants For A Future notes marked noncommercial.

An easily grown plant, it succeeds in most soils and situations so long as the soil is not too dry[1][3][8]. This species tolerates much drier conditions than other members of the genus[13]. Prefers a slightly acid soil[3]. Grows well in heavy clay soils. A sunny position is best for production of essential oils, but it also succeeds in partial shade. Plants are hardy to at least -15°c[13]. Most mints have fairly aggressive spreading roots and, unless you have the space to let them roam, they need to be restrained by some means such as planting them in containers that are buried in the soil[K]. The whole plant has a very strong scent of peppermint[17]. Hybridizes freely with other members of this genus. Polymorphic[8]. The flowers are very attractive to bees and butterflies[14]. A good companion plant for growing near brassicas and tomatoes, helping to deter insect pests[7]. Members of this genus are rarely if ever troubled by browsing deer[12].

References

  1. F. Chittendon. RHS Dictionary of Plants plus Supplement. 1956 Oxford University Press 1951-00-00

    ↩

  2. ? A Barefoot Doctors Manual. Running Press ISBN 0-914294-92-X

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  3. Simons. New Vegetable Growers Handbook. Penguin 1977-00-00 ISBN 0-14-046-050-0

    ↩1↩2

  4. Schofield. J. J. Discovering Wild Plants - Alaska, W. Canada and the Northwest.

    ↩1↩2

  5. Philbrick H. and Gregg R. B. Companion Plants. Watkins 1979-00-00

    ↩

  6. Facciola. S. Cornucopia - A Source Book of Edible Plants. Kampong Publications 1990-00-00 ISBN 0-9628087-0-9

    ↩1↩2↩3

  7. Riotte. L. Companion Planting for Successful Gardening. Garden Way, Vermont, USA. 1978-00-00 ISBN 0-88266-064-0

    ↩1↩2

  8. Huxley. A. The New RHS Dictionary of Gardening. 1992. MacMillan Press 1992-00-00 ISBN 0-333-47494-5

    ↩1↩2

  9. Lust. J. The Herb Book. Bantam books 1983-00-00 ISBN 0-553-23827-2

    ↩

  10. Duke. J. A. and Ayensu. E. S. Medicinal Plants of China Reference Publications, Inc. 1985-00-00 ISBN 0-917256-20-4

    ↩1↩2↩3

  11. Foster. S. & Duke. J. A. A Field Guide to Medicinal Plants. Eastern and Central N. America. Houghton Mifflin Co. 1990-00-00 ISBN 0395467225

    ↩1↩2

  12. Thomas. G. S. Perennial Garden Plants J. M. Dent & Sons, London. 1990-00-00 ISBN 0 460 86048 8

    ↩

  13. Bown. D. Encyclopaedia of Herbs and their Uses. Dorling Kindersley, London. 1995-00-00 ISBN 0-7513-020-31

    ↩1↩2↩3↩4↩5

  14. Baines. C. Making a Wildlife Garden.

    ↩

  15. Chopra. R. N., Nayar. S. L. and Chopra. I. C. Glossary of Indian Medicinal Plants (Including the Supplement). Council of Scientific and Industrial Research, New Delhi. 1986-00-00

    ↩

  16. Phillips. R. & Foy. N. Herbs Pan Books Ltd. London. 1990-00-00 ISBN 0-330-30725-8

    ↩

  17. Genders. R. Scented Flora of the World. Robert Hale. London. 1994-00-00 ISBN 0-7090-5440-8

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  18. Flora of China 1994-00-00 http://flora.huh.harvard.edu/china/

    ↩

  19. Medicinal Plants in the Republic of Korea World Health Organisation, Manila 1998-00-00 ISBN 92 9061 120 0

    ↩1↩2↩3

  20. Mabey. R. Food for Free. Collins 1974-00-00 ISBN 0-00-219060-5

    ↩

  21. Turner. N. J. Plants in British Columbian Indian Technology. British Columbia Provincial Museum 1979-00-00 ISBN 0-7718-8117-7

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