Description
Cephalanthus occidentalis, also called Buttonbush, is an original and very decorative shrub which produces creamy white pompom flowers, fragrant and honey-producing, from July to August. Native to North America, it can reach 2 to 4 meters in height and 4 m in width, and thrives in moist, acidic to neutral soils.
Cephalanthus occidentalis belongs to the Rubiaceae family, like the coffee tree or the gardenia. It is distinguished by its bushy and irregular habit, its deciduous, oval, lanceolate and shiny leaves, medium green in colour, and its tubular flowers gathered in compact balls 3 cm in diameter. These flowers are very popular with bees and butterflies, who come to collect their nectar. They are also lightly scented and can be used in dried bouquets.
Cephalanthus occidentalis is an easy-to-grow shrub that requires little maintenance. It is planted in spring or autumn, in a hole twice as wide and deep as the root ball. The soil must be packed tightly around the base and watered thoroughly after planting. Buttonbush likes fresh to moist, even marshy, rich, well-drained soils. It does not like limestone or drought. It prefers a warm and sunny exposure where its flowering will be more abundant, but tolerates partial shade. It is hardy down to -29°C, but it can lose its branches in case of intense frost and start again from the stump.
Cephalanthus occidentalis is a shrub that can be used alone, in clumps, as a free hedge or at the edge of a pond. It goes well with other humid soil plants, such as Japanese irises, ligularia, astilbe or filipendula. It brings a touch of originality and charm to the garden with its unusual flowering.
Cephalanthus occidentalis is a cold-resistant shrub, but it can suffer from late frosts. To protect it from the cold of winter, you must mulch its base with dead leaves or compost, and wrap its foliage with a winter cover. If the branches are damaged by frost, they must be pruned in spring.
Cephalanthus occidentalis is a shrub that is not very sensitive to diseases and parasites. Cephalanthus occidentalis does not need regular pruning, except to give it a harmonious shape or to remove dead or damaged branches. Pruning is carried out at the beginning of spring, before vegetation resumes. The branches must be cut about 20 cm from the ground to encourage branching and flowering.
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