Alpine butterbur
Petasites frigidus · Asteraceae
The gardener's calendar
Ideal time to plant alpine butterbur: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Family
- Asteraceae
- Type
- Perennial herbaceous
- Foliage
- Deciduous
- Flowering
- Spring (April-May)
- Adult size
- 0.3 to 0.6 m in height
- Hardiness
- Very hardy (-30°C and below)
- Origin
- Arctic and subarctic regions
- Exposure
- Part shade to shade
Care
Exposure
Cold climate butterbur prefers part-shaded to fully shaded locations, particularly in warm climates. It also tolerates partial sun in very cold regions. Avoid direct exposure to harsh southern rays during the hottest hours.
Watering
Keep the soil regularly moist without waterlogging, especially during spring growth. This plant appreciates naturally damp soils and areas near water sources. Gradually reduce watering after flowering and foliage fades.
Soil
Cold climate butterbur thrives in rich, well-draining soils that remain cool and moist. Acidic to neutral soil is ideal. Enrich the substrate with compost or leaf mold to recreate the conditions of its natural habitat.
Pruning and cleanup
No strict pruning is necessary. Simply remove faded stems and leaves after flowering and summer. You can limit the spread of underground rhizomes if they become excessive by removing young peripheral shoots.
Fertilizing
Apply a balanced natural fertilizer in spring when growth begins. One annual application is sufficient if the soil is rich. Avoid excess nitrogen, which would promote foliage at the expense of flowering.
Health and pests
Cold climate butterbur is generally very hardy and seldom subject to disease in suitable climates. Watch for excessive moisture that could promote rot. Good drainage and aeration prevent most fungal problems.
Did you know?
Cold climate butterbur is a remarkably cold-resistant arctic plant, traditionally used by northern peoples for its hemostatic properties. Its genus name Petasites comes from the Greek 'petasos' (wide hat), alluding to its large leaves that can serve as a natural umbrella in wet and cold regions.
Where to buy it
Plant in spring or early autumn, avoiding spells of intense heat. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, April, May, September.
Add this plant to my garden →Plants from the same family
- SunflowerHelianthus annuus
- YarrowAchillea millefolium
- Ox-eye daisyLeucanthemum vulgare
- SneezewortAchillea ptarmica
- Canadian goldenrodSolidago canadensis
- WormwoodArtemisia absinthium
Tips generated and checked by Viridia — adapt them to your local climate.