PlantsPetasites→Butterbur (Petasites japonicus)

Common names:
Give a thumbs up Butterbur
Give a thumbs up Japanese Butterbur
Give a thumbs up Sweet Coltsfoot
Give a thumbs up Fuki
Give a thumbs up Bog Rhubarb

Also sold as:
Petasites japonica

General Plant Information (Edit)
Plant Habit: Herb/Forb
Life cycle: Perennial
Sun Requirements: Full Sun to Partial Shade
Partial or Dappled Shade
Partial Shade to Full Shade
Water Preferences: Wet
Wet Mesic
Minimum cold hardiness: Zone 5a -28.9 °C (-20 °F) to -26.1 °C (-15 °F)
Plant Height: 2 to 3 feet 60-90 cm)
Plant Spread: 3 to 5 feet (90-150 cm)
Leaves: Other: Giant Leaves appear after flowering
Flowers: Inconspicuous
Flower Color: White
Bloom Size: Under 1"
Flower Time: Late winter or early spring
Underground structures: Rhizome
Suitable Locations: Bog gardening
Uses: Erosion control
Water gardens
Will Naturalize
Edible Parts: Leaves
Eating Methods: Cooked
Resistances: Humidity tolerant
Toxicity: Other: Contains pyrrolizidine alkaloids (PAs) which have been associated with cumulative damage to the liver and tumor formation. Also contains the carcinogenic PA petasitenine.
Propagation: Other methods: Cuttings: Root
Stolons and runners
Pollinators: Various insects
Miscellaneous: Dioecious


Photo gallery:

Discussion Threads about this plant
Thread Title Last Reply Replies
Not sure what plant this is? by iMacg3 May 28, 2018 12:19 PM 7
What species is this? (Binomial name please) by NightCrow May 23, 2018 3:30 PM 3
Left overs free to good home by poisondartfrog Feb 20, 2016 3:23 PM 8
Petasites Nishiki-buki by eclayne Jun 16, 2015 9:48 PM 8
Let's talk about elephant ears! by Swayback Apr 4, 2021 11:02 AM 1,012
Need ID please by gg5 Mar 13, 2013 12:34 PM 22
Unknown Houseplant...ID help? by rusty3019 Aug 3, 2015 3:47 PM 18
Show us your garden 11 by boojum Jun 1, 2011 6:51 PM 231

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