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Petasites japonicus var. giganteus
Petasites japonicus var. giganteus
Garden Diary

Date purchased or acquired:

Where acquired:

Location in the garden:


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Petasites japonicus var. giganteus

Giant Japanese Butterbur

USDA Zone: 4-9

Plant number: 1.408.100

This is a monster plant for the waterside, bearing enormous rounded leaves that look a little like rhubarb. Greenish flowers appear on naked stems in early spring. A bold, textural plant, it looks great beside a pond or stream. Place carefully: this is an aggressive spreader and difficult to eradicate once established. Spreading can be controlled by sinking a heavy plastic or metal tub into the ground and placing within. Plants will tolerate shallow standing water. Clumps may be divided in early spring. Young leaf stems are used as a vegetable in Japan.

Further details for
Petasites japonicus var. giganteus

Optimal Growing
Appearance and
Sun Exposure
  Full Sun or
  Partial Shade
Soil Type
  Normal or
Soil pH
  Neutral or
  Alkaline or
Soil Moisture
  Average or
  Moist or
Care Level
Flower Colour
Blooming Time
  Early Spring
  Mid Spring
Foliage Color
  Deep Green
Plant Uses & Characteristics
  Accent: Good Texture/Form
  Cut Flower
   120-180 cm
   47-70 inches
   90-120 cm
   35-47 inches
Foot Traffic
Growth Rate
Disclaimer: This information is presented for reference only. This plant is not currently part of our Heritage Perennials lineup.