plant

Fuki butterbur

Petasites japonicus

Updated 4 Aug 2026 · AI-parsed entry

Fuki butterbur (Petasites japonicus) — a plant, for Part shade, High water.

What it needs & gives back

↓ Needs

Lightpart_shade to shade
Waterconsistently moist to wet

↑ Gives back

Mulch_biomassmedium to high
Shadedense ground cover

Through the year

Through the year

JFMAMJJASOND
emergenceEmergence of new shoots in early spring after the last frost and when soil temperatures rise above 5°C.
floweringFlowering occurs shortly after emergence, typically in early to mid-spring.
fruitingFruiting follows flowering, with seeds maturing by late spring to early summer.
senescenceFoliage begins to die back with the first autumn frosts.
dormancyEnters dormancy after senescence, remaining dormant through winter.

Soil interactions

Drainagepoor to moist
Nitrogen fixingNo
MycorrhizalNo
Accumulatespotassium, calcium
Soil textureloam, clay
Organic matterHigh
Compaction toleranceMedium

Propagation

Methodsseed, division, rhizome_cuttings
Difficulty2 / 5
Establishes in~1 yr
Self-seedingModerate
Divisionspring

Wildlife & pests

Can host pestsslugs, snails