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Uses

Edible uses

Notes

Leaf stalks - cooked and used like rhubarb[1][2][3][4]. The stems can be up to 1.2 metres long[5]. They can be boiled and seasoned, pickled and used in winter soups or preserved in miso[6]. They can be boiled, dipped in cold water then peeled and baked - they have a pleasant fragrant taste[7].

Flower buds cooked or used as a flavouring[1][8][3][9][10]. A slightly bitter yet agreeable flavour[4][7], they are much prized in Japan[6]. They can be eaten whilst still green with miso or boiled down in soy sauce[6].

The young flowering stems can be eaten cooked[7].

Flowers

Material uses

The leaves of the sub-species P. japonicus giganteus are used as umbrellas by Japanese children[11]. The leaf stalks can be used as walking sticks[7]. Plants can be grown as ground cover in damp shady places[7]. They are too invasive for most gardens and should only be used where they have plenty of room[12].
There are no material uses listed for Petasites japonicus.

Medicinal uses(Warning!)

The plant (though the exact part of the plant used is not specified) is antiasthmatic, antispasmodic, expectorant and poultice[13]. A decoction is used in the treatment of chronic coughing and pulmonary 'deficiency', laboured or difficult breathing and asthma, constant sputum formation and pulmonary tuberculosis[13].

Ecology

Ecosystem niche/layer

Soil surface

Ecological Functions

Ground cover

Forage

Nothing listed.

Shelter

Nothing listed.

Propagation

Seed - we have no information on this species but suggest sowing the seed in a cold frame as soon as it is ripe or in early spring. Only just cover the seed and do not allow the compost to dry out. When they are large enough to handle, prick the seedlings out into individual pots and plant them out in the summer. Division succeeds at almost any time of the year. Very easy, larger divisions can be planted out direct into their permanent positions. We have found that it is better to pot up the smaller divisions and grow them on in light shade in a cold frame until they are well established before planting them out in late spring or early summer.

Practical Plants is currently lacking information on propagation instructions of Petasites japonicus. Help us fill in the blanks! Edit this page to add your knowledge.



Cultivation

Succeeds in ordinary garden soil[1], but prefers a deep fertile humus-rich soil that is permanently moist but not stagnant, succeeding in shade, semi-shade or full sun[14]. Requires a moist shady position[11]. Plants can be grown in quite coarse grass, which can be cut annually in the autumn[15].

A very invasive plant, too rampant for anything other than the wild garden[11][14]. Its roots are very difficult to eradicate[14]. The sub-species P. japonicus giganteus has huge leaves up to 1.5 metres across on stems 2 metres tall[11]. It has a poorer flavour than the species type[7]. Sometimes cultivated in E. Asia as a food plant[1][16].

Dioecious, male and female plants must be grown if seed is required.

Crops

Problems, pests & diseases

Associations & Interactions

There are no interactions listed for Petasites japonicus. Do you know of an interaction that should be listed here? edit this page to add it.

Polycultures & Guilds

There are no polycultures listed which include Petasites japonicus.

Descendants

Cultivars

Varieties

None listed.

Subspecies

None listed.

Full Data

This table shows all the data stored for this plant.

Taxonomy
Binomial name
Petasites japonicus
Genus
Petasites
Family
Compositae
Imported References
Medicinal uses
Material uses & Functions
Botanic
Propagation
Cultivation
Environment
Cultivation
Uses
Edible uses
None listed.
Material uses
None listed.
Medicinal uses
None listed.
Functions & Nature
Functions
Provides forage for
Provides shelter for
Environment
Hardiness Zone
5
Heat Zone
?
Water
high
Sun
full sun
Shade
permanent shade
Soil PH
Soil Texture
Soil Water Retention
Environmental Tolerances
    Ecosystems
    Native Climate Zones
    None listed.
    Adapted Climate Zones
    None listed.
    Native Geographical Range
    None listed.
    Native Environment
    None listed.
    Ecosystem Niche
    Root Zone Tendancy
    None listed.
    Life
    Deciduous or Evergreen
    ?
    Herbaceous or Woody
    ?
    Life Cycle
    Growth Rate
    Mature Size
    Fertility
    Pollinators
    Flower Colour
    ?
    Flower Type

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    "image:Petasites japonicus 001.jpg|248px" cannot be used as a page name in this wiki., "image:Petasites japonicus 001.jpg|248px" cannot be used as a page name in this wiki., "image:Petasites japonicus 001.jpg|248px" cannot be used as a page name in this wiki. "image:Petasites japonicus 001.jpg|248px" cannot be used as a page name in this wiki., "image:Petasites japonicus 001.jpg|248px" cannot be used as a page name in this wiki., "image:Petasites japonicus 001.jpg|248px" cannot be used as a page name in this wiki.

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    References

    1. ? 1.01.11.21.31.4 F. Chittendon. RHS Dictionary of Plants plus Supplement. 1956 Oxford University Press (1951-00-00)
    2. ? 2.02.1 Hedrick. U. P. Sturtevant's Edible Plants of the World. Dover Publications ISBN 0-486-20459-6 (1972-00-00)
    3. ? 3.03.13.2 Uphof. J. C. Th. Dictionary of Economic Plants. Weinheim (1959-00-00)
    4. ? 4.04.14.2 Brooklyn Botanic Garden Oriental Herbs and Vegetables, Vol 39 No. 2. Brooklyn Botanic Garden (1986-00-00)
    5. ? 5.05.1 RHS. The Garden. Volume 111. Royal Horticultural Society (1986-00-00)
    6. ? 6.06.16.26.3 Facciola. S. Cornucopia - A Source Book of Edible Plants. Kampong Publications ISBN 0-9628087-0-9 (1990-00-00)
    7. ? 7.07.17.27.37.47.57.67.7 Larkcom J. Oriental Vegetables John Murray ISBN 0-7195-4781-4 (1991-00-00)
    8. ? 8.08.1 Sholto-Douglas. J. Alternative Foods. ()
    9. ? 9.09.1 Usher. G. A Dictionary of Plants Used by Man. Constable ISBN 0094579202 (1974-00-00)
    10. ? 10.010.1 Tanaka. T. Tanaka's Cyclopaedia of Edible Plants of the World. Keigaku Publishing (1976-00-00)
    11. ? 11.011.111.211.311.4 Phillips. R. & Rix. M. Perennials Volumes 1 and 2. Pan Books ISBN 0-330-30936-9 (1991-00-00)
    12. ? 12.012.1 Thomas. G. S. Plants for Ground Cover J. M. Dent & Sons ISBN 0-460-12609-1 (1990-00-00)
    13. ? 13.013.113.2 ? A Barefoot Doctors Manual. Running Press ISBN 0-914294-92-X ()
    14. ? 14.014.114.214.3 Huxley. A. The New RHS Dictionary of Gardening. 1992. MacMillan Press ISBN 0-333-47494-5 (1992-00-00)
    15. ? Thomas. G. S. Perennial Garden Plants J. M. Dent & Sons, London. ISBN 0 460 86048 8 (1990-00-00)
    16. ? 16.016.1 Ohwi. G. Flora of Japan. (English translation) Smithsonian Institution (1965-00-00)

    "image:Petasites japonicus 001.jpg|248px" cannot be used as a page name in this wiki.

    Facts about "Petasites japonicus"RDF feed
    Article is incompleteYes +
    Article requires citationsNo +
    Article requires cleanupYes +
    Belongs to familyCompositae +
    Belongs to genusPetasites +
    Functions asGround cover +
    Has binomial namePetasites japonicus +
    Has common nameSweet Coltsfoot +
    Has drought toleranceIntolerant +
    Has edible partFlowers + and Stem +
    Has edible useUnknown use +
    Has fertility typeSelf sterile + and Insects +
    Has flowers of typeDioecious +
    Has growth rateVigorous +
    Has hardiness zone5 +
    Has imagePetasites japonicus 001.jpg +
    Has lifecycle typePerennial +
    Has mature height0.6 +
    Has mature width1.5 +
    Has medicinal partUnknown part +
    Has medicinal useAntiasthmatic +, Antispasmodic +, Expectorant + and Poultice +
    Has primary imagePetasites japonicus 001.jpg +
    Has search namepetasites japonicus + and sweet coltsfoot +
    Has shade tolerancePermanent shade +
    Has soil ph preferenceAcid +, Neutral + and Alkaline +
    Has soil texture preferenceSandy +, Loamy + and Clay +
    Has sun preferenceFull sun +
    Has taxonomic rankSpecies +
    Has taxonomy namePetasites japonicus +
    Has water requirementshigh +
    Inhabits ecosystem nicheSoil surface +
    Is taxonomy typeSpecies +
    PFAF cultivation notes migratedNo +
    PFAF edible use notes migratedNo +
    PFAF material use notes migratedNo +
    PFAF medicinal use notes migratedNo +
    PFAF propagation notes migratedNo +
    PFAF toxicity notes migratedYes +
    Tolerates nutritionally poor soilNo +
    Uses mature size measurement unitMeters +
    Has subobjectThis property is a special property in this wiki.Petasites japonicus +, Petasites japonicus +, Petasites japonicus +, Petasites japonicus +, Petasites japonicus + and Petasites japonicus +