Clethra, also known as Clethra alnifolia, is a deciduous flowering shrub belonging to the family Clethraceae. Native to eastern North America, it is commonly referred to as the "summer sweet" or "sweet pepperbush" due to its fragrant blooms that typically appear during the summer months. The name "alnifolia" indicates its resemblance to alder leaves.
Clethra is characterized by its dense, upright growth habit, reaching an average height of 6-8 feet (1.8-2.4 meters) and spreading 4-6 feet (1.2-1.8 meters) wide. The shrub exhibits dark green, serrated leaves, which turn golden yellow in the fall, providing an attractive display of autumn color.
The flowers of the Clethra are a major highlight, creating clusters of delicate white, pink, or purple-tinged blossoms that emit a strong, sweet fragrance. These blossoms not only attract bees and butterflies but also add aesthetic appeal to gardens and landscapes. In the aftermath of the blooming period, Clethra produces small brown seed capsules that add interest and texture to the plant.
Clethra thrives in moist, acidic soil, making it ideal for woodland gardens, wetlands, or alongside water features such as ponds or streams. It is highly adaptable and relatively low-maintenance, requiring minimal pruning to maintain its shape and size.
Due to its visual appeal, pleasant scent, and ability to attract pollinators, Clethra is popularly cultivated as an ornamental shrub, enhancing the natural beauty of outdoor spaces.
