Giant Butterbur, Sweet Coltsfoot, Japanese Butterbur, Bog Rhubarb
Petasites japonicus
🌿 Morphology
🌞 Growing conditions
🌍 Origin and family
🌾 Uses
Warning: Despite the care taken in writing this sheet, it is essential to cross-reference sources before using or consuming any plant. When in doubt, consult a qualified professional
Permaculture uses
The blanched flower stalks and young leaves are edible when cooked, offering a unique, slightly bitter flavor. It can be used as a ground cover in wet or boggy areas. Certain cultivars, like 'Variegatus', are grown for ornamental purposes due to their attractive foliage. Its large leaves provide excellent mulch material. Juice from the plant is a traditional remedy for skin issues.
Permapeople description
A large-leaved perennial plant with early-spring flower spikes, often used in Japanese cuisine.
Botanical description
Petasites japonicus is a rhizomatous perennial herbaceous plant in the family Asteraceae. It is characterized by its very large, round to kidney-shaped leaves, which can reach up to 3 feet in diameter. The leaves are typically green, but cultivars like 'Variegatus' display white or cream-colored variegation. It produces clusters of white or pale pink flowers on erect stalks in early spring, before the leaves emerge. The plant prefers moist, shady conditions and is often found in riparian habitats.
Companion planting
Little formal information exists. Due to its vigorous growth, it can be considered invasive and should be planted with plants that can tolerate competition for space and resources. Generally not a good companion plant for smaller, less competitive plants.
Propagation methods
Propagation is primarily achieved through rhizome division in spring or autumn. Seeds can also be used, although they may require stratification and the resulting plants might show variability. Cuttings are generally not recommended.
History and traditions
In Japan, the plant, known as 'fuki', has a long history of culinary use. The blanched flower stalks and young leaves are considered a delicacy. Traditionally, it has also been used in herbal medicine for various ailments, including coughs and skin problems. Historically used as a form of natural bandage due to the size and shape of the leaves.
Usage calendar
Flowering: Early Spring (before leaf emergence). Harvesting (stalks and leaves): Spring. Planting/Division: Spring or Autumn. Pruning (dead leaves): Autumn or Winter.