Clethra 'Hummingbird'

Clethra alnifolia "Hummingbird"

$24.00 Sold out

1 Gallon | Hardiness Zones 5-9

Clethra alnifolia and the southern Clethra tomentosa are stoloniferous deciduous shrubs commonly called Summersweet or Sweet Pepperbush. They form colonies in moist acid soil and make good garden subjects. They are valued for their terminal spikes of fragrant white flowers in summer. Plant in sun or semi-shade and provide adequate moisture. This compact and floriferous selection spreads vigorously by rhizomes and forms large colonies. Flowers open earlier than typical for the species. A selection made by the late Fred Galle of Callaway Gardens, Georgia. Dirr says it is "one of the finest, compact deciduous shrubs available to gardeners." Clethra alnifolia is native to eastern U.S.

Pickup currently unavailable at Aiken Nursery

PLANT DETAILS

Hardiness Zones: 5 - 9

Soil: Acid and Moist

Sun: Full Sun and Part Shade

Seasonal Behavior: Deciduous

Growth Rate: Slow to Moderate

Height at Maturity: 30 - 40 Inches

Spread at Maturity: 6 - 8 Feet

Flower Structure: Produces fragrant, white flower spikes.

Blooming Season: Blooms in mid to late summer, usually from July to August.

Color: The flowers are pure white, creating a striking visual display against the dark green foliage.

White, fragrant, racemes, summer

Light Requirements: Prefers partial shade to full sun. While it can tolerate full shade, flowering is more prolific in full sun to partial shade.

Soil Requirements: Thrives in moist, acidic, well-draining soil. It prefers a pH range of 5.0 to 6.5. Adding organic matter such as compost can improve soil fertility and structure. It can tolerate wet soils and is suitable for rain gardens and boggy areas.

Watering: Requires regular watering, especially during dry periods. Keep the soil consistently moist but not waterlogged. It is important to maintain adequate moisture, particularly during the first growing season to establish a deep root system.

Temperature and Humidity: Hardy in USDA zones 5-9. Prefers moderate temperatures and can tolerate both humid and dry conditions. It is adaptable to a range of climates within its hardiness zones.

Fertilization: Apply a balanced, slow-release fertilizer in early spring to support healthy growth and abundant flowering. An annual application of compost or well-rotted manure can further enhance soil fertility.

Pruning: Prune in late winter or early spring to remove dead or damaged branches and to shape the shrub. Light pruning can help promote a denser growth habit and more prolific flowering. Remove spent flower spikes after blooming to maintain a tidy appearance.

Pests and Problems: Generally pest-resistant but can occasionally attract aphids, spider mites, and caterpillars. Ensure good air circulation to prevent fungal diseases like powdery mildew. If pests are detected, treat with insecticidal soap or neem oil.

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