homebanner homebanner homebanner homebanner homebanner homebanner
Petasites japonicus - (Siebold.&Zucc.)Maxim.
                 
Common Name Sweet Coltsfoot, Japanese sweet coltsfoot, Butterbur
Family Asteraceae or Compositae
USDA hardiness 5-9
Known Hazards None known
Habitats Moist woods and thickets[58].
Range E. Asia - China, Japan, Korea. Naturalized in Britain.
Edibility Rating  
Other Uses  
Weed Potential No
Medicinal Rating  
Care
Fully Hardy Moist Soil Wet Soil Full shade Semi-shade Full sun

Summary
Bloom Color: White. Main Bloom Time: Early spring, Late winter. Form: Spreading or horizontal, Upright or erect.

Petasites japonicus Sweet Coltsfoot, Japanese sweet coltsfoot, Butterbur


http://commons.wikimedia.org/wiki/User:Vihljun
Petasites japonicus Sweet Coltsfoot, Japanese sweet coltsfoot, Butterbur
http://commons.wikimedia.org/wiki/User:Dalgial
   
Physical Characteristics
 icon of manicon of flower
Petasites japonicus is a PERENNIAL growing to 0.6 m (2ft) by 1.5 m (5ft in) at a fast rate.
It is hardy to zone (UK) 5. It is in flower in February, and the seeds ripen in March. The flowers are dioecious (individual flowers are either male or female, but only one sex is to be found on any one plant so both male and female plants must be grown if seed is required) and are pollinated by Insects.The plant is not self-fertile.
Suitable for: light (sandy), medium (loamy) and heavy (clay) soils. Suitable pH: acid, neutral and basic (alkaline) soils. It can grow in full shade (deep woodland) semi-shade (light woodland) or no shade. It prefers moist or wet soil.

Synonyms
Nardosmia japonica.

Habitats
Woodland Garden Sunny Edge; Dappled Shade; Shady Edge; not Deep Shade; Ground Cover; Meadow; Bog Garden;
Edible Uses
Edible Parts: Flowers;  Stem.
Edible Uses:

Leaf stalks - cooked and used like rhubarb[1, 2, 46, 116]. The stems can be up to 1.2 metres long[104]. They can be boiled and seasoned, pickled and used in winter soups or preserved in miso[183]. They can be boiled, dipped in cold water then peeled and baked - they have a pleasant fragrant taste[206]. Flower buds cooked or used as a flavouring[1, 22, 46, 61, 105]. A slightly bitter yet agreeable flavour[116, 206], they are much prized in Japan[183]. They can be eaten whilst still green with miso or boiled down in soy sauce[183]. The young flowering stems can be eaten cooked[206].
Composition
Figures in grams (g) or miligrams (mg) per 100g of food.
Leaves (Dry weight)
  • 250 Calories per 100g
  • Water : 0%
  • Protein: 19.5g; Fat: 2.8g; Carbohydrate: 52.8g; Fibre: 19.4g; Ash: 25g;
  • Minerals - Calcium: 1194mg; Phosphorus: 556mg; Iron: 2.8mg; Magnesium: 0mg; Sodium: 917mg; Potassium: 12500mg; Zinc: 0mg;
  • Vitamins - A: 278mg; Thiamine (B1): 0.56mg; Riboflavin (B2): 0.56mg; Niacin: 5.56mg; B6: 0mg; C: 56mg;
  • Reference: [ ]
  • Notes:
Medicinal Uses


Plants For A Future can not take any responsibility for any adverse effects from the use of plants. Always seek advice from a professional before using a plant medicinally.

Antiasthmatic;  Antispasmodic;  Expectorant;  Miscellany;  Poultice.

The plant (though the exact part of the plant used is not specified) is antiasthmatic, antispasmodic, expectorant and poultice[147]. 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[147].
Other Uses
Miscellany.

The leaves of the sub-species P. japonicus giganteus are used as umbrellas by Japanese children[187]. The leaf stalks can be used as walking sticks[206]. Plants can be grown as ground cover in damp shady places[206]. They are too invasive for most gardens and should only be used where they have plenty of room[208].
Cultivation details
Landscape Uses:Container, Ground cover, Massing, Woodland garden. 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[200]. Requires a moist shady position[187]. Plants can be grown in quite coarse grass, which can be cut annually in the autumn[233]. A very invasive plant, too rampant for anything other than the wild garden[187, 200]. Its roots are very difficult to eradicate[200]. The sub-species P. japonicus giganteus has huge leaves up to 1.5 metres across on stems 2 metres tall[187]. It has a poorer flavour than the species type[206]. Sometimes cultivated in E. Asia as a food plant[1, 58]. Dioecious, male and female plants must be grown if seed is required. Special Features:Attractive foliage, Not North American native, Invasive, Wetlands plant, Flower characteristics are unknown.
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.

Books by Plants For A Future

Other Names
Found In
Weed Potential

Right plant wrong place. We are currently updating this section. Please note that a plant may be invasive in one area but may not in your area so it’s worth checking.

Conservation Status
IUCN Red List of Threatened Plants Status :
Related Plants
Latin NameCommon NameEdibility RatingMedicinal Rating
Petasites albusButterbur21
Petasites frigidusSweet Coltsfoot, Arctic sweet coltsfoot, Arrowleaf sweet coltsfoot, Golden Palms Coltsfoot, Butterb21
Petasites hybridusButterbur, Pestilence wort03
Petasites hyperboreusArctic Sweet Coltsfoot21
Petasites palmatusSweet Butterbur, Golden Palms Coltsfoot, Sweet Coltsfoot, Butterbur21
Petasites saggitatusArrowleaf Sweet Coltsfoot21
Petasites speciosa 20
Petasites vitifoliusArctic sweet coltsfoot10
Plant Suppliers: Click here for a List

      You can download this page as a PDF

Due to a fault in the PDF printer we are trying a few different options. Please try the one below

 

Print Friendly and PDF
Expert comment
 
Author
(Siebold.&Zucc.)Maxim.
Botanical References
58200
Links / References
For a list of references used on this page please go here
Readers comment
 
Elizabeth H.
Brian Blanthorn Tue Mar 18 2008
I think this should have a hazard warning it contains alkaloids but so do a number of our very common foods Young leaves are also eaten ( cooked ) Cooking does seem to reduce this I do not pretend to be a exepert in this and I think could do with futher research when you reviw the info Heres what I have so far, http://www.whfoods.com/genpage.php?tname=george&dbid=206 Quote xxx How does cooking affect alkaloid content in nightshade foods? Steaming, boiling, and baking all help reduce the alkaloid content of nightshades. Alkaloids are only reduced, however, by about 40-50% from cooking. For non-sensitive individuals, the cooking of nightshade foods will often be sufficient to make the alkaloid risk from nightshade intake insignificant. However, for sensitive individuals, the remaining alkaloid concentration may be enough to cause problems. xxxx Also lists many other plants like potatoe / tomatoes with alkaloid in them Another site with sensible info on "toxic" common everday food http://www.beyondveg.com/tu-j-l/raw-cooked/raw-cooked-1g.shtml A search with petasites japonicus toxicity cooking, or petasites japonicus cooking Individuals with arthritis can be affected by this Thanks for a truly excellent databace Brian Blanthorn
Elizabeth H.
David Freeman Thu May 8 2008
May have more health benefits than previously thought. Extracts useful in treatment of brain diseases in combination with other elements. Patent information request call 800-648-6787.
QR Code

What's this?

This is a QR code (short for Quick Response) which gives fast-track access to our website pages. QR Codes are barcodes that can be read by mobile phone (smartphone) cameras. This QR Code is unique to this page. All plant pages have their own unique code. For more information about QR Codes click here.

1. Copy and print the QR code to a plant label, poster, book, website, magazines, newspaper etc and even t-shirts.
2. Smartphone users scan the QR Code which automatically takes them to the webpage the QR Code came from.
3. Smartphone users quickly have information on a plant directly for the pfaf.org website on their phone.
Add a comment/link

If you have important information about this plant that may help other users please add a comment or link below. Only comments or links that are felt to be directly relevant to a plant will be included. If you think a comment/link or information contained on this page is inaccurate or misleading we would welcome your feedback at admin@pfaf.org. If you have questions about a plant please use the Forum on this website as we do not have the resources to answer questions ourselves.

* Please note: the comments by website users are not necessarily those held by PFAF and may give misleading or inaccurate information.

To leave a comment please Register or login here All comments need to be approved so will not appear immediately.

Subject : Petasites japonicus  

Plant Uses

Edible Uses
Medicinal Uses
Other Plant uses
Woodland Gardening
Why Perennial Plants?
Top Edible Plants
Top Medicinal Plants
Garden Design
Habitats
Translations

Twiter      Facebook

Content

Content Help
Bookshop
Support Us
Blog
Links
Old Database Search
Suppliers
Contact
About Us
News
Sign In

PFAF Newsletter

Stay informed about PFAFs progress,
challenges and hopes by signing up for
our free email ePost. You will receive
a range of benefits including:
* Important announcements and news
* Exclusive content not on the website
* Updates on new information &
functionality of the website & database

We will not sell or share your email address.
You can unsubscribe at anytime.