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Summersweet

Clethra alnifolia

Summersweet, also called Sweet Pepperbush, is a deciduous shrub native to the eastern U.S., often found in moist woodlands, stream banks, and coastal areas. It thrives in full sun to partial shade and prefers consistently moist, acidic soils—but it can also handle occasional dry spells once established.

Typically growing 3–8 feet tall, Summersweet forms a dense, upright shape with glossy, dark green leaves that turn brilliant golden-yellow in fall. From mid to late summer, it produces upright, bottlebrush-like clusters of highly fragrant white or pinkish flowers. These blooms are rich in nectar and attract a wide variety of pollinators—especially bumblebees and small butterflies—when floral resources are otherwise scarce.

Details

Height36” - 96”
Spread60"
Bloom SeasonJuly – August
Soil Types
clayClay
loamLoam
sandSand
Soil Moisture
mediumMedium
moistMoist
wetWet
Sun Exposure
fullShadeFull Shade
partSunPart Sun
fullSunFull Sun

Range Map

Native
No current
record

Ecological Benefits

Maintenance Tips

  • Prune in late winter or early spring if shaping is desired; blooms form on new growth.
  • Mulch annually to retain soil moisture and improve soil structure.
  • Divide suckers if you want to manage spread or propagate new plants.
  • Tolerates wet feet—excellent for rain gardens and bioswales.

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