Summersweet Clethra Shrub - Clethra alnifolia

Summersweet Clethra (Clethra alnifolia)

The Summersweet Clethra is a deciduous shrub that delivers delicate, sweetly-scented white flower spikes throughout the summer months. This compact, hardy plant thrives in conditions that challenge other ornamentals, making it an excellent choice for gardeners seeking reliable performance. Buy Summersweet Clethra online to add season-long beauty and fragrance to your landscape.

Landscaping Uses

Plant this shrub along borders, in mixed garden beds, or as part of perennial collections throughout your yard. It performs exceptionally well in moisture-rich areas and damp soils where many plants struggle, making it ideal for low-lying spots and transitional zones. The fragrant blooms also attract hummingbirds and other pollinators, bringing wildlife activity to your outdoor space.

Specifications

Height: 3–8 feet
Width: 3–4 feet
Growth Rate: Moderate
Sun: Full sun to partial shade (4–8 hours daily)
Water: Regular during establishment; drought-tolerant once established
Soil: Adaptable to most soil types; thrives in well-drained to moist conditions
USDA Zones: 3–9

Why Homeowners Love It

• Produces fragrant white flowers that bloom reliably throughout summer
• Extremely cold-hardy, surviving temperatures down to -20°F
• Compact growth habit fits comfortably in smaller spaces and tight gardens
• Tolerates wet, boggy, and poor soil conditions that discourage other shrubs

Planting & Care

Choose a location receiving four to eight hours of sunlight daily with well-drained soil. Dig a hole twice as wide as the root ball, place your shrub, backfill with soil, and water thoroughly to settle the earth. Water regularly during the first growing season—roughly once per week or whenever the top two to three inches of soil feel dry. Once established, this shrub requires minimal maintenance. Apply a balanced, slow-release fertilizer in early spring if desired, and prune occasionally during the growing season to maintain your preferred shape.