Clethra alnifolia
Sweet Pepperbush
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Sweet Pepperbush (Clethra alnifolia) - Description
C. alnifolia is an Eastern United States native. It bears thin, strong branches that grow in a vertical pattern. It also bears dark green tooth-edged leaves that appear in late spring, and turn golden yellow to brownish in the fall.
Sweet Pepperbush (Clethra alnifolia) - Blooming
White or pink, fragant, cup-shaped flowers will bloom in mid-summer to late-summer.
Sweet Pepperbush (Clethra alnifolia) - Growth
Deciduous and evergreen trees and shrubs. Plants in this genus will range from 4-20 ft. tall. Does best in partial shade. Grow Clethra in a shrub border or woodland garden. In frost-prone areas where C. arborea does not grow hardy, raise plants in a cool greenhouse with a minimum temperature of 35°F (2°C). During the day, set temperatures between 41-50°F (5-10°C), and at night, keep the temperature at 36°F (2°C). Move plants outside during the summer.
Sweet Pepperbush (Clethra alnifolia) - Planting
Sow seeds in spring or fall; hardy species can be planted in containers outdoors. Can also propagate deciduous species by rooting greenwood cuttings in early summer. Evergreen species can be propagated by rooting semi-ripe cuttings in mid to late summer.
Sweet Pepperbush (Clethra alnifolia) - Pest
Common problems include fungal dieback and root rot.
Sweet Pepperbush (Clethra alnifolia) - Soil and irrigation
Clethra is not fussy about soil but does prefer soil that is moist, acidic, and well-drained. Plant should be watered regularly.
