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Petasites japonicus | Japanese Butterbur

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DESCRIPTION
Petasites japonicus sends up rounded clusters of pale creamy flowers in very early spring, often before the foliage fully expands, bringing a quiet seasonal awakening to shaded garden spaces. Soon after bloom, large, softly textured leaves unfurl into broad green discs carried on sturdy stems, creating a lush, cooling presence that endures through the growing season and lends bold structure to woodland plantings.

Native to Japan, Korea, and parts of eastern China, it reflects the moist forest margins and streamside environments of East Asia where it has long been gathered and cultivated. Vigorous vegetative growth allows colonies to broaden gradually, contributing enduring texture and leafy fullness across summer.

DESCRIPTION
Petasites japonicus sends up rounded clusters of pale creamy flowers in very early spring, often before the foliage fully expands, bringing a quiet seasonal awakening to shaded garden spaces. Soon after bloom, large, softly textured leaves unfurl into broad green discs carried on sturdy stems, creating a lush, cooling presence that endures through the growing season and lends bold structure to woodland plantings.

Native to Japan, Korea, and parts of eastern China, it reflects the moist forest margins and streamside environments of East Asia where it has long been gathered and cultivated. Vigorous vegetative growth allows colonies to broaden gradually, contributing enduring texture and leafy fullness across summer.

 

  • Family: Asteraceae
    Height: 24 to 36 in
    Width: 36 to 60 in
    Foliage color: Very large rounded green leaves forming bold dense colonies
    Flower color: Pale yellowish white flower clusters on thick upright stems
    Bloom time: Late winter to early spring
    Light requirements: Partial shade to full shade
    Water requirements: Consistently moist to wet rich soil
    Maintenance: Moderate; spreads vigorously by rhizomes and may require containment
    Growing zone: USDA zones 4 to 9
    Wildlife attractors: Bees and other early season pollinators

    This plant can be seen at the Crystal Springs Rhododendron Garden.

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