PatternBaseJapanese Butterbur
Petasites japonicus, Asteraceae
Zones
5–9
Layer
Herbaceous
Lifespan
Perennial
Growth
Fast
Guild Roles
ProducerGround CoverMulch MakerDynamic Accumulator
Growing Conditions
Sun
Partial Shade (preferred)Full Shade (tolerated)
Water
High (established)High (seedling)
Soil pH
6 – 7.5
Tolerances
Drought
Frost
Heat
Pest Resistance
Disease Resist.
Companion Plants
Antagonistic Plants
Western YarrowAchillea lanulosa
Japanese Butterbur's aggressive spreading and allelopathic compounds can suppress yarrow and other herbaceous perennials
Sacred DaturaDatura innoxiaJapanese Butterbur's aggressive spreading may compete with Sacred Datura for root space and resources
BistortPolygonum bistortaBoth species form dense colonies that exclude other plants through root competition and allelopathic effects
Uses
Functions
Seasonal GroundcoverMedicinal HarvestLarge Leaf MulchErosion Control
Edible Parts
Young ShootsFlower Buds
Medicinal Uses
Migraine PreventionAllergic RhinitisAnti-InflammatoryRespiratory SupportPain Relief
Common Questions
What zones does Japanese Butterbur grow in?
Japanese Butterbur grows in USDA hardiness zones 5 through 9.
What are good companion plants for Japanese Butterbur?
Good companions for Japanese Butterbur include Szechuan Lovage, Diviner's Sage, Northern Firmoss.
Design guilds with Japanese Butterbur and see companion relationships visually.
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