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Eastern buttonbush (Cephalanthus occidentalis) is a native shrub in the Rubiaceae family, measuring between 1 and 3 metres in height. It has a rounded or spreading habit, with multiple stems emerging from the base. Its leaves are opposite or sometimes arranged in whorls of three, simple, oval to elliptical, glossy green on the upper side and duller underneath. Flowering occurs from July to August, in the form of spherical heads of small creamy white tubular flowers, rich in nectar, borne at the end of long peduncles. These globular inflorescences, which resemble pom-poms or untidy heads, attract many pollinators. The fruits, forming persistent brownish balls, are made up of capsules that contain small seeds.
Eastern buttonbush naturally grows in wet environments: marshes, bogs, riverbanks, ditches, and lakeshores. It tolerates temporary flooding and heavy soils, but requires at least some moisture to thrive. It grows in full sun or partial shade. It is mainly found in southern Quebec and eastern North America.
Ecological roles
Eastern buttonbush is a very important species for wetland habitats. Its nectar-rich flowers attract a wide variety of pollinators: bees, hoverflies, hummingbirds, and many butterflies. It also serves as shelter and a perch for various birds. Its fruits are eaten by aquatic birds such as ducks.
Its developed root system helps stabilize banks and prevent erosion in wetland areas.
Akène cannot assume any responsibility for the use of plants for therapeutic purposes. Always seek advice from a professional before using a medicinal or edible plant.
Sowing and Growing
Technical Details
Seeds per packet:
Family: Rubiaceae
Scientific name: Cephalanthus occidentalis
Life cycle: Perennial
Hardiness zone: 4
Soil type: Sandy to clayey
Soil moisture level: Wet to soggy
Soil - additional attributes: Suitable for marshy soils and riverbanks
Light: Sun, part shade
Blooming: July to August
Spacing: 100 cm
Height: 300 cm
Deer resistance: Moderate
Stratification: No
Scarification: No
Germination time: 14 to 28 days
Sowing depth: Surface