Clethra alnifolia – Sweet Pepper Bush; Summersweet

General Information: A spreading, dense shrub with solid green foliage and fragrant white flower clusters. The white flower clusters, which emerge in late summer, are a magnet for beneficial insects. In fall, Sweet Pepperbush develops a lovely golden coloration. These shrubs are often found as the dominant shrub species in coastal marshes and swampland throughout their range. They are very easy to cultivate in a garden setting, as long as the soil is moist enough. These bushes tend to spread to form colonies, making them an ideal choice to replace mud and muck with fragrance and flowers!

Cultivation Details: Sweet Pepperbush thrives in wetlands. Consider for filling low spots, as an addition along pods, streams, lakes, or rivers. Sweet Pepperbush is especially useful as a border plant near wet spots along roadways and paths. They are useful for softening the noise of traffic in areas where waterways are near the road. Consider pairing with Groundnut (Apios americana), Tupelo (Nyssa sylvatica), and Buttonbush (Cephalanthus occidentalis) for a dazzling display of fragrance and fall foliage. The flowers of this plant are extremely attratctive to Honeybees. Sweet Pepperbush honey is considered a delicacy. Beekeepers may consider growing Sweet Pepperbush to create specialty honey.

Growing Requirements: Plant in full to part sun. Prefers moist to wet soils. Prefers sandy or loamy soils. Does not tolerate heavy clay. Suitable for mildly acidic and neutral soils. Does not tolerate alkaline soils. Plants grown in unfavorable moisture and soil conditions may survive but display a weakened stature and produce less flowers.

Fun Facts: The “Sweet” part of this plant’s name derives from the aromatic scent given off by the flowers. The “Pepper” part references the seed pods, which resemble peppercorns, but are not spicy and not considered edible.