EVERGREEN

Plant Encyclopedia

Mentha pulegium

Mentha pulegium (pennyroyal, "Megusahakka")

Japanese name: メグサハッカ (目草薄荷)
Scientific name: Mentha pulegium

Mentha pulegium

[Overview]
A perennial 10–40 cm tall.
It is hairless or hairy, and the whole plant has a strong fragrance.
The stem is square in cross section.
Leaves are simple and opposite, narrowly elliptic, 0.8–3 cm long and 0.4–1.2 cm wide, with hairs on the underside.
The leaf margins are entire or have a few teeth.
Spike-like verticillasters are produced at the stem tips.
The flowers are two-lipped and 4-lobed, wisteria-colored.

[Uses]
It is cultivated as a herb and used medicinally and as an insect repellent.

[Cultivation]
Propagate by division or stem cuttings.
It prefers slightly moist, well-drained soil in sun to bright shade.
It is hardy and spreads by underground stems, so when planting in a garden, it is better to make a barrier underground to keep it from spreading too much.
For potted plants, water when the soil surface dries.
Fertilizer is not particularly necessary, and too much weakens the fragrance.
It is strongly drought tolerant and also tolerates heat and humidity, but if the branches become crowded, they become stuffy and disease may occur.

Details

Names
English: pennyroyal, pennyrile, squaw mint, mosquito plant, pudding grass
Japanese: メグサハッカ(目草薄荷)、ペニーロイヤルミント、クリーピングペニーロイヤル、ペニローヤルミント
Life form
Perennial
Habit
Terrestrial
Planting (or sowing) season
April, May
Flowering season
July, August, September
Distribution or origin
Europe, North Africa, Western Asia
Height
100–400 mm
Leaf shape
Simple leaf (unlobed)
Leaf arrangement
Opposite
Leaf margin
Entire, Dentate
Inflorescence
Verticillate cyme
Flower color
Purple
Leaf color
Green
Availability of seeds and plants
Low
Form sold
Seeds, Seedlings
Propagation
Division, Bud cuttings
Sun exposure
Full sun, Partial shade
Water needs
Moderate
Soil needs
Required
Suitable uses
Ground cover, Flower bed, Parks and gardens, Container, Balcony, Hanging basket
Uses
Medicinal
Japan Flower Trade Code
28136

Translated from our Japanese encyclopedia. If anything differs, the Japanese page is correct.

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