Summer Sparkler Summersweet

Summer Sparkler Summersweet (Clethra alnifolia 'Novacleein')

Summer Sparkler Summersweet (Clethra alnifolia 'Novacleein') is a compact, deciduous native shrub known for its exceptionally long, narrow flower spikes and sweet summer fragrance. A refined cultivar of the Eastern North American native, this selection stands out for its distinctive floral form, compact habit, and strong pollinator appeal, making it a beautiful and functional addition to moist, shady landscapes.

Distinctive Features

'Summer Sparkler' lives up to its name with airy, bottlebrush-like white flower spikes that can reach up to 12 inches long�far more elongated than other Clethra varieties. Blooming in mid to late summer, these fragrant flowers attract pollinators in droves and provide extended seasonal interest. The dark green foliage forms a clean, rounded mound and turns a bright yellow in fall. This cultivar has a more restrained, compact form and requires little maintenance once established.

Growing Conditions

• Sun Exposure: Full sun to partial shade
• Soil: Moist, acidic soils; performs well in loam, clay, or sandy soils
• Water: Moderate to high; thrives in consistently moist conditions
• USDA Hardiness Zones: 4�9

Ideal Uses

• Focal Point: Long, elegant flower spikes and fragrance create a standout summer display
• Rain Gardens: Performs beautifully in wet or low-lying areas
• Pollinator Gardens: A magnet for bees, butterflies, and hummingbirds
• Foundation Planting: Compact growth habit fits well near homes and structures
• Woodland Edges: Natural texture and bloom fit seamlessly into part-shade borders

Low Maintenance Care

• Watering: Maintain consistent moisture, especially during dry periods
• Pruning: Prune after flowering to maintain shape if necessary
• Fertilizing: Apply a balanced fertilizer in early spring if needed
• Mulching: Mulch to retain moisture and suppress weeds
• Protection: Best performance in acidic soil with good drainage and regular moisture

Why Choose Summer Sparkler Summersweet?

• Exceptionally Long Blooms: Unique 12-inch flower spikes offer extended summer interest
• Compact Native Shrub: Ideal for small gardens, rain gardens, and shade beds
• Pollinator Favorite: High nectar value supports beneficial wildlife
• Low Maintenance: Adapts to a variety of conditions and requires little pruning
• Focal Point: Distinctive flowers and fragrant display make it a showpiece in summer gardens

Clethra alnifolia 'Novacleein' (Summer Sparkler Summersweet) delivers a striking combination of unique flower form, native adaptability, and low-maintenance care�perfect as a compact focal point in moist borders, pollinator gardens, or shaded landscape designs.